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                <?php  | 
            
                            
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                    2
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                define('COL_DESCRIPTION', 0); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    3
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                define('COL_HELP', 1); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    4
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                define('COL_DEFAULT', 2); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    5
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                    6
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                $fields = [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    7
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                    'author_name' =>            ['Your name',             '',                                                ''],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    8
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                    'author_github_username' => ['Your Github username',  '<username> in https://github.com/username',       ''],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    9
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                    'author_email' =>           ['Your email address',    '',                                                ''],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    10
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                    'author_twitter' =>         ['Your twitter username', '',                                                '@{author_github_username}'], | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    11
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                    'author_website' =>         ['Your website',          '',                                                'https://github.com/{author_github_username}'], | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    12
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                    13
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                    'package_vendor' =>         ['Package vendor',        '<vendor> in https://github.com/vendor/package',   '{author_github_username}'], | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    14
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                    'package_name' =>           ['Package name',          '<package> in https://github.com/vendor/package',  ''],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    15
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                    'package_description' =>    ['Package very short description',   '',                                     ''],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    16
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                    17
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                    'psr4_namespace' =>         ['PSR-4 namespace',       'usually, Vendor\\Package',                        '{package_vendor}\\{package_name}'], | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    18
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                ];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    19
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                    20
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                $values = [];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    21
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                    22
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                $replacements = [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    23
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                    ':vendor\\\\:package_name\\\\' => function () use(&$values) { return str_replace('\\', '\\\\', $values['psr4_namespace']) . '\\\\'; }, | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    24
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                    ':author_name'                 => function () use(&$values) { return $values['author_name']; }, | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    25
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                    ':author_username'             => function () use(&$values) { return $values['author_github_username']; }, | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    26
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                    ':author_website'              => function () use(&$values) { return $values['author_website'] ?: ('https://github.com/' . $values['author_github_username']); }, | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    27
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                    ':author_email'                => function () use(&$values) { return $values['author_email'] ?: ($values['author_github_username'] . '@example.com'); }, | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    28
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                    ':vendor'                      => function () use(&$values) { return $values['package_vendor']; }, | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    29
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                    ':package_name'                => function () use(&$values) { return $values['package_name']; }, | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    30
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                    ':package_description'         => function () use(&$values) { return $values['package_description']; }, | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    31
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                    'League\\Skeleton'             => function () use(&$values) { return $values['psr4_namespace']; }, | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    32
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                ];  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    33
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                    34
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                function read_from_console ($prompt) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                    35
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                    if ( function_exists('readline') ) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                    36
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                        $line = trim(readline($prompt));  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    37
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                        if (!empty($line)) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                    38
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                            readline_add_history($line);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    39
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                        }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    40
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                    } else { | 
            
            
                                                                        
                            
            
                                    
            
            
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                    41
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                        echo $prompt;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    42
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                        $line = trim(fgets(STDIN));  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    43
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                    }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    44
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                    return $line;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    45
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                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    46
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                    47
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                function interpolate($text, $values)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    48
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    49
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                    if (!preg_match_all('/\{(\w+)\}/', $text, $m)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    50
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                        return $text;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    51
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    52
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                    foreach ($m[0] as $k => $str) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $f = $m[1][$k];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $text = str_replace($str, $values[$f], $text);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    return $text;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    57
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                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    59
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                $modify = 'n';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    60
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                do { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    61
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                    if ($modify == 'q') { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    62
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                        exit;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    63
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    64
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                    65
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                    $values = [];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    66
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                    67
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                    echo "----------------------------------------------------------------------\n";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    68
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                    echo "Please, provide the following information:\n";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    69
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                    echo "----------------------------------------------------------------------\n";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    70
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                    foreach ($fields as $f => $field) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    71
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                        $default = isset($field[COL_DEFAULT]) ? interpolate($field[COL_DEFAULT], $values): '';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    72
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                        $prompt = sprintf(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    73
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                            '%s%s%s: ',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    74
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                            $field[COL_DESCRIPTION],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $field[COL_HELP] ? ' (' . $field[COL_HELP] . ')': '', | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    76
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                            $field[COL_DEFAULT] !== '' ? ' [' . $default . ']': ''  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    77
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                        );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    78
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                        $values[$f] = read_from_console($prompt);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    79
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                        if (empty($values[$f])) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    80
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                            $values[$f] = $default;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    81
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    82
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    83
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                    echo "\n";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    84
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                    85
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                    echo "----------------------------------------------------------------------\n";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    86
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                    echo "Please, check that everything is correct:\n";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    87
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                    echo "----------------------------------------------------------------------\n";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    88
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                    foreach ($fields as $f => $field) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    89
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                        echo $field[COL_DESCRIPTION] . ": $values[$f]\n";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    90
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    91
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                    echo "\n";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    92
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                } while (($modify = strtolower(read_from_console('Modify files with these values? [y/N/q] '))) != 'y'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    93
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                echo "\n";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    94
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                    95
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                $files = array_merge(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    96
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                    glob(__DIR__ . '/*.md'),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    97
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                    glob(__DIR__ . '/*.xml.dist'),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    98
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                    glob(__DIR__ . '/composer.json'),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    99
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                    glob(__DIR__ . '/src/*.php'),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    100
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                    glob(__DIR__ . '/tests/*.php')  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    101
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                );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    102
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                foreach ($files as $f) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    103
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                    $contents = file_get_contents($f);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    104
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                    foreach ($replacements as $str => $func) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    105
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                        $contents = str_replace($str, $func(), $contents);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    106
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    107
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                    file_put_contents($f, $contents);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    108
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                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    109
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                    110
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                echo "Done.\n";  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    111
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                echo "Now you should remove the file '" . basename(__FILE__) . "'.\n";  | 
            
            
                                                        
            
                                    
            
            
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                    112
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The PSR-1: Basic Coding Standard recommends that a file should either introduce new symbols, that is classes, functions, constants or similar, or have side effects. Side effects are anything that executes logic, like for example printing output, changing ini settings or writing to a file.
The idea behind this recommendation is that merely auto-loading a class should not change the state of an application. It also promotes a cleaner style of programming and makes your code less prone to errors, because the logic is not spread out all over the place.
To learn more about the PSR-1, please see the PHP-FIG site on the PSR-1.