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<?php |
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/** |
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* File containing the {@link FileHelper_PHPClassInfo} class. |
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* |
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* @package Application Utils |
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* @subpackage FileHelper |
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* @see FileHelper_PHPClassInfo |
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*/ |
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declare(strict_types=1); |
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namespace AppUtils; |
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use AppUtils\FileHelper\PHPFile; |
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/** |
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* Used to retrieve information on the PHP classes contained |
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* within the target PHP file. Does not use the reflection API. |
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* This is meant as a quick way to check for the presence of |
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* classes, and which classes they extend or interfaces are |
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* implemented. |
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* |
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* @package Application Utils |
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* @subpackage FileHelper |
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* @author Sebastian Mordziol <[email protected]> |
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* @see FileHelper::findPHPClasses() |
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*/ |
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class FileHelper_PHPClassInfo |
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{ |
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public const TYPE_CLASS = 'class'; |
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public const TYPE_TRAIT = 'trait'; |
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public const TYPE_INTERFACE = 'interface'; |
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protected PHPFile $file; |
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protected string $namespace = ''; |
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/** |
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* @var array<string,FileHelper_PHPClassInfo_Class> |
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*/ |
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protected array $classes = array(); |
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/** |
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* @var string[] |
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*/ |
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private static array $types = array( |
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self::TYPE_CLASS, |
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self::TYPE_INTERFACE, |
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self::TYPE_TRAIT |
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); |
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/** |
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* @param PHPFile $path The path to the PHP file to parse. |
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* @throws FileHelper_Exception |
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* @see FileHelper::findPHPClasses() |
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*/ |
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public function __construct(PHPFile $path) |
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{ |
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$this->file = $path |
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->requireExists() |
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->requireReadable(); |
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$this->parseFile(); |
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} |
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/** |
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* The name of the namespace of the classes in the file, if any. |
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* @return string |
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*/ |
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public function getNamespace() : string |
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{ |
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return $this->namespace; |
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} |
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/** |
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* Whether the file contains a namespace. |
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* @return bool |
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*/ |
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public function hasNamespace() : bool |
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{ |
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return !empty($this->namespace); |
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} |
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/** |
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* The absolute path to the file. |
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* @return string |
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*/ |
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public function getPath() : string |
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{ |
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return $this->file->getPath(); |
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} |
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/** |
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* Whether any classes were found in the file. |
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* @return bool |
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*/ |
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public function hasClasses() : bool |
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{ |
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return !empty($this->classes); |
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} |
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/** |
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* The names of the classes that were found in the file (with namespace if any). |
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* @return string[] |
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*/ |
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public function getClassNames() : array |
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{ |
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return array_keys($this->classes); |
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} |
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/** |
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* Retrieves all classes that were detected in the file, |
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* which can be used to retrieve more information about |
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* them. |
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* |
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* @return FileHelper_PHPClassInfo_Class[] |
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*/ |
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public function getClasses() : array |
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{ |
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return array_values($this->classes); |
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} |
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protected function parseFile() : void |
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{ |
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$code = php_strip_whitespace($this->getPath()); |
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$this->detectNamespace($code); |
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$result = $this->detectMatches($code); |
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if($result === null) { |
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return; |
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} |
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$indexes = array_keys($result[0]); |
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foreach($indexes as $idx) |
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{ |
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$this->parseResult( |
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$result[1][$idx], |
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$result[3][$idx], |
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$result[2][$idx], |
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$result[4][$idx], |
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$result[5][$idx] |
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); |
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} |
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} |
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/** |
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* @param string $code |
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* @return array<int,array<int,string>>|null |
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*/ |
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private function detectMatches(string $code) : ?array |
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{ |
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$types = implode('|', self::$types); |
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$result = array(); |
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preg_match_all('/(abstract|final)\s+('.$types.')\s+([\sa-z\d\\\\_,]+){|('.$types.')\s+([\sa-z\d\\\\_,]+){/ix', $code, $result, PREG_PATTERN_ORDER); |
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if(isset($result[0][0])) { |
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return $result; |
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} |
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return null; |
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} |
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private function detectNamespace(string $code) : void |
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{ |
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$result = array(); |
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preg_match_all('/namespace\s+([^;]+);/ix', $code, $result, PREG_PATTERN_ORDER); |
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if(isset($result[0][0])) { |
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$this->namespace = trim($result[1][0]); |
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} |
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} |
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private function parseResult(string $keyword, string $declaration, string $type, string $simpleType, string $simpleDeclaration) : void |
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{ |
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if(empty($keyword)) { |
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$type = $simpleType; |
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$declaration = $simpleDeclaration; |
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} |
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$class = new FileHelper_PHPClassInfo_Class( |
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$this, |
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$this->stripWhitespace($declaration), |
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trim($keyword), |
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$type |
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); |
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$this->classes[$class->getNameNS()] = $class; |
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} |
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/** |
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* Strips all whitespace from the string, replacing it with |
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* regular spaces (newlines, tabs, etc.). |
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* |
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* @param string $string |
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* @return string |
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*/ |
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protected function stripWhitespace(string $string) : string |
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{ |
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return preg_replace('/\s/', ' ', $string); |
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} |
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} |
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This check looks for function or method calls that always return null and whose return value is assigned to a variable.
The method
getObject()
can return nothing but null, so it makes no sense to assign that value to a variable.The reason is most likely that a function or method is imcomplete or has been reduced for debug purposes.