CPsr4Autoloader::loadClass() - Code Metrics - mosbth/anax - Measure and Improve Code Quality continuously with Scrutinizer

CPsr4Autoloader::loadClass() A
last analyzed 2018-10-19 17:34 UTC

↳ Parent: CPsr4Autoloader

Complexity

Conditions	4
Paths	5

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	20

Importance

Changes

Metric	Value
cc	4
nc	5
nop	1
dl	0
loc	36
ccs	0
cts	15
cp	0
crap	20
rs	9.344
c	0
b	0
f	0

<?php
/**
 * An example of a general-purpose implementation that includes the optional
 * functionality of allowing multiple base directories for a single namespace
 * prefix.
 *
 * Added feature to have a default directory for unresolved namespaces.
 *
 * Given a foo-bar package of classes in the file system at the following
 * paths ...
 *
 *     /path/to/packages/foo-bar/
 *         src/
 *             Baz.php             # Foo\Bar\Baz
 *             Qux/
 *                 Quux.php        # Foo\Bar\Qux\Quux
 *         tests/
 *             BazTest.php         # Foo\Bar\BazTest
 *             Qux/
 *                 QuuxTest.php    # Foo\Bar\Qux\QuuxTest
 *
 * ... add the path to the class files for the \Foo\Bar\ namespace prefix
 * as follows:
 *
 *      <?php
 *      // instantiate the loader
 *      $loader = new \Example\Psr4AutoloaderClass;
 *
 *      // register the autoloader
 *      $loader->register();
 *
 *      // register the base directories for the namespace prefix
 *      $loader->addNamespace('Foo\Bar', '/path/to/packages/foo-bar/src');
 *      $loader->addNamespace('Foo\Bar', '/path/to/packages/foo-bar/tests');
 *
 * The following line would cause the autoloader to attempt to load the
 * \Foo\Bar\Qux\Quux class from /path/to/packages/foo-bar/src/Qux/Quux.php:
 *
 *      <?php
 *      new \Foo\Bar\Qux\Quux;
 *
 * The following line would cause the autoloader to attempt to load the
 * \Foo\Bar\Qux\QuuxTest class from /path/to/packages/foo-bar/tests/Qux/QuuxTest.php:
 *
 *      <?php
 *      new \Foo\Bar\Qux\QuuxTest;
 *
 * @link https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-4-autoloader-examples.md
 */

namespace Anax\Loader;

class CPsr4Autoloader
{
    /**
     * An associative array where the key is a namespace prefix and the value
     * is an array of base directories for classes in that namespace.
     *
     * @var array
     */
    protected $prefixes = array();



    /**
     * Register loader with SPL autoloader stack.
     *
     * @return $this
     */
    public function register()
    {
        spl_autoload_register(array($this, 'loadClass'));
        return $this;
    }



    /**
     * Adds a base directory for a namespace prefix.
     *
     * @param string $prefix The namespace prefix.
     * @param string $base_dir A base directory for class files in the
     * namespace.
     * @param bool $prepend If true, prepend the base directory to the stack
     * instead of appending it; this causes it to be searched first rather
     * than last.
     * @return $this
     */
    public function addNamespace($prefix, $base_dir, $prepend = false)
    {
        // normalize namespace prefix
        $prefix = trim($prefix, '\\') . '\\';

        // normalize the base directory with a trailing separator
        $base_dir = rtrim($base_dir, '/') . DIRECTORY_SEPARATOR;
        $base_dir = rtrim($base_dir, DIRECTORY_SEPARATOR) . '/';

        // initialize the namespace prefix array
        if (isset($this->prefixes[$prefix]) === false) {
            $this->prefixes[$prefix] = array();
        }

        // retain the base directory for the namespace prefix
        if ($prepend) {
            array_unshift($this->prefixes[$prefix], $base_dir);
        } else {
            array_push($this->prefixes[$prefix], $base_dir);
        }

        return $this;
    }



    /**
     * Loads the class file for a given class name.
     *
     * @param string $class The fully-qualified class name.
     * @return mixed The mapped file name on success, or boolean false on
     * failure.
     */
    public function loadClass($class)
    {
        // the current namespace prefix
        $prefix = $class;

        // work backwards through the namespace names of the fully-qualified
        // class name to find a mapped file name
        $relative_class = null;
        while (false !== $pos = strrpos($prefix, '\\')) {
            // retain the trailing namespace separator in the prefix
            $prefix = substr($class, 0, $pos + 1);

            // the rest is the relative class name
            $relative_class = substr($class, $pos + 1);

            // try to load a mapped file for the prefix and relative class
            $mapped_file = $this->loadMappedFile($prefix, $relative_class);

            if ($mapped_file) {
''   == false // true
''   == null  // true
'ab' == false // false
'ab' == null  // false

// It is often better to use strict comparison
'' === false // false
'' === null  // false
                return $mapped_file;
            }

            // remove the trailing namespace separator for the next iteration
            // of strrpos()
            $prefix = rtrim($prefix, '\\');
        }

        // try to load a mapped file for the default prefix and relative class
        $mapped_file = $this->loadMappedFile('\\', $relative_class);
        if ($mapped_file) {
''   == false // true
''   == null  // true
'ab' == false // false
'ab' == null  // false

// It is often better to use strict comparison
'' === false // false
'' === null  // false
            return $mapped_file;
        }

        // never found a mapped file
        return false;
    }



    /**
     * Load the mapped file for a namespace prefix and relative class.
     *
     * @param string $prefix         The namespace prefix.
     * @param string $relative_class The relative class name.
     *
     * @return mixed Boolean false if no mapped file can be loaded, or the
     * name of the mapped file that was loaded.
     */
    protected function loadMappedFile($prefix, $relative_class)
    {
        // are there any base directories for this namespace prefix?
        if (isset($this->prefixes[$prefix]) === false) {
            return false;
        }

        // look through base directories for this namespace prefix
        foreach ($this->prefixes[$prefix] as $base_dir) {
            // replace the namespace prefix with the base directory,
            // replace namespace separators with directory separators
            // in the relative class name, append with .php
            $file = $base_dir
$myVar = 'Value';
$higher = false;

if (rand(1, 6) > 3) {
    $higher = true;
} else {
    $higher = false;
}
                  . str_replace('\\', DIRECTORY_SEPARATOR, $relative_class)
                  . '.php';
            $file = $base_dir
                  . str_replace('\\', '/', $relative_class)
                  . '.php';

            // if the mapped file exists, require it
            if ($this->requireFile($file)) {
                // yes, we're done
                return $file;
            }
        }

        // never found it
        return false;
    }



    /**
     * If a file exists, require it from the file system.
     *
     * @param string $file The file to require.
     * @return bool True if the file exists, false if not.
     */
    protected function requireFile($file)
    {
        if (file_exists($file)) {
            require $file;
            return true;
        }
        return false;
    }
}


1			<?php
2			/**
3			* An example of a general-purpose implementation that includes the optional
4			* functionality of allowing multiple base directories for a single namespace
5			* prefix.
6			*
7			* Added feature to have a default directory for unresolved namespaces.
8			*
9			* Given a foo-bar package of classes in the file system at the following
10			* paths ...
11			*
12			* /path/to/packages/foo-bar/
13			* src/
14			* Baz.php # Foo\Bar\Baz
15			* Qux/
16			* Quux.php # Foo\Bar\Qux\Quux
17			* tests/
18			* BazTest.php # Foo\Bar\BazTest
19			* Qux/
20			* QuuxTest.php # Foo\Bar\Qux\QuuxTest
21			*
22			* ... add the path to the class files for the \Foo\Bar\ namespace prefix
23			* as follows:
24			*
25			* <?php
26			* // instantiate the loader
27			* $loader = new \Example\Psr4AutoloaderClass;
28			*
29			* // register the autoloader
30			* $loader->register();
31			*
32			* // register the base directories for the namespace prefix
33			* $loader->addNamespace('Foo\Bar', '/path/to/packages/foo-bar/src');
34			* $loader->addNamespace('Foo\Bar', '/path/to/packages/foo-bar/tests');
35			*
36			* The following line would cause the autoloader to attempt to load the
37			* \Foo\Bar\Qux\Quux class from /path/to/packages/foo-bar/src/Qux/Quux.php:
38			*
39			* <?php
40			* new \Foo\Bar\Qux\Quux;
41			*
42			* The following line would cause the autoloader to attempt to load the
43			* \Foo\Bar\Qux\QuuxTest class from /path/to/packages/foo-bar/tests/Qux/QuuxTest.php:
44			*
45			* <?php
46			* new \Foo\Bar\Qux\QuuxTest;
47			*
48			* @link https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-4-autoloader-examples.md
49			*/
50
51			namespace Anax\Loader;
52
53			class CPsr4Autoloader
54			{
55			/**
56			* An associative array where the key is a namespace prefix and the value
57			* is an array of base directories for classes in that namespace.
58			*
59			* @var array
60			*/
61			protected $prefixes = array();
62
63
64
65			/**
66			* Register loader with SPL autoloader stack.
67			*
68			* @return $this
69			*/
70			public function register()
71			{
72			spl_autoload_register(array($this, 'loadClass'));
73			return $this;
74			}
75
76
77
78			/**
79			* Adds a base directory for a namespace prefix.
80			*
81			* @param string $prefix The namespace prefix.
82			* @param string $base_dir A base directory for class files in the
83			* namespace.
84			* @param bool $prepend If true, prepend the base directory to the stack
85			* instead of appending it; this causes it to be searched first rather
86			* than last.
87			* @return $this
88			*/
89			public function addNamespace($prefix, $base_dir, $prepend = false)
90			{
91			// normalize namespace prefix
92			$prefix = trim($prefix, '\\') . '\\';
93
94			// normalize the base directory with a trailing separator
95			$base_dir = rtrim($base_dir, '/') . DIRECTORY_SEPARATOR;
96			$base_dir = rtrim($base_dir, DIRECTORY_SEPARATOR) . '/';
97
98			// initialize the namespace prefix array
99			if (isset($this->prefixes[$prefix]) === false) {
100			$this->prefixes[$prefix] = array();
101			}
102
103			// retain the base directory for the namespace prefix
104			if ($prepend) {
105			array_unshift($this->prefixes[$prefix], $base_dir);
106			} else {
107			array_push($this->prefixes[$prefix], $base_dir);
108			}
109
110			return $this;
111			}
112
113
114
115			/**
116			* Loads the class file for a given class name.
117			*
118			* @param string $class The fully-qualified class name.
119			* @return mixed The mapped file name on success, or boolean false on
120			* failure.
121			*/
122			public function loadClass($class)
123			{
124			// the current namespace prefix
125			$prefix = $class;
126
127			// work backwards through the namespace names of the fully-qualified
128			// class name to find a mapped file name
129			$relative_class = null;
130			while (false !== $pos = strrpos($prefix, '\\')) {
131			// retain the trailing namespace separator in the prefix
132			$prefix = substr($class, 0, $pos + 1);
133
134			// the rest is the relative class name
135			$relative_class = substr($class, $pos + 1);
136
137			// try to load a mapped file for the prefix and relative class
138			$mapped_file = $this->loadMappedFile($prefix, $relative_class);
139
140			if ($mapped_file) {
			0 ignored issues – show Bug Best Practice introduced 2015-12-03 20:17 UTC by Report Bug Copy Issue Report The expression `$mapped_file` of type `false\|string` is loosely compared to `true`; this is ambiguous if the string can be empty. You might want to explicitly use `!== false` instead. In PHP, under loose comparison (like `==`, or `!=`, or `switch` conditions), values of different types might be equal. For `string` values, the empty string `''` is a special case, in particular the following results might be unexpected: '' == false // true '' == null // true 'ab' == false // false 'ab' == null // false // It is often better to use strict comparison '' === false // false '' === null // false Loading history...
141			return $mapped_file;
142			}
143
144			// remove the trailing namespace separator for the next iteration
145			// of strrpos()
146			$prefix = rtrim($prefix, '\\');
147			}
148
149			// try to load a mapped file for the default prefix and relative class
150			$mapped_file = $this->loadMappedFile('\\', $relative_class);
151			if ($mapped_file) {
			0 ignored issues – show Bug Best Practice introduced 2015-12-03 20:17 UTC by Report Bug Copy Issue Report The expression `$mapped_file` of type `false\|string` is loosely compared to `true`; this is ambiguous if the string can be empty. You might want to explicitly use `!== false` instead. In PHP, under loose comparison (like `==`, or `!=`, or `switch` conditions), values of different types might be equal. For `string` values, the empty string `''` is a special case, in particular the following results might be unexpected: '' == false // true '' == null // true 'ab' == false // false 'ab' == null // false // It is often better to use strict comparison '' === false // false '' === null // false Loading history...
152			return $mapped_file;
153			}
154
155			// never found a mapped file
156			return false;
157			}
158
159
160
161			/**
162			* Load the mapped file for a namespace prefix and relative class.
163			*
164			* @param string $prefix The namespace prefix.
165			* @param string $relative_class The relative class name.
166			*
167			* @return mixed Boolean false if no mapped file can be loaded, or the
168			* name of the mapped file that was loaded.
169			*/
170			protected function loadMappedFile($prefix, $relative_class)
171			{
172			// are there any base directories for this namespace prefix?
173			if (isset($this->prefixes[$prefix]) === false) {
174			return false;
175			}
176
177			// look through base directories for this namespace prefix
178			foreach ($this->prefixes[$prefix] as $base_dir) {
179			// replace the namespace prefix with the base directory,
180			// replace namespace separators with directory separators
181			// in the relative class name, append with .php
182			$file = $base_dir
			0 ignored issues – show Unused Code introduced 2015-12-03 20:17 UTC by Report Bug Copy Issue Report `$file` is not used, you could remove the assignment. This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently. $myVar = 'Value'; $higher = false; if (rand(1, 6) > 3) { $higher = true; } else { $higher = false; } Both the `$myVar` assignment in line 1 and the `$higher` assignment in line 2 are dead. The first because `$myVar` is never used and the second because `$higher` is always overwritten for every possible time line. Loading history...
183			. str_replace('\\', DIRECTORY_SEPARATOR, $relative_class)
184			. '.php';
185			$file = $base_dir
186			. str_replace('\\', '/', $relative_class)
187			. '.php';
188
189			// if the mapped file exists, require it
190			if ($this->requireFile($file)) {
191			// yes, we're done
192			return $file;
193			}
194			}
195
196			// never found it
197			return false;
198			}
199
200
201
202			/**
203			* If a file exists, require it from the file system.
204			*
205			* @param string $file The file to require.
206			* @return bool True if the file exists, false if not.
207			*/
208			protected function requireFile($file)
209			{
210			if (file_exists($file)) {
211			require $file;
212			return true;
213			}
214			return false;
215			}
216			}
217

mosbth / anax

CPsr4Autoloader::loadClass() A last analyzed 2018-10-19 17:34 UTC

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CPsr4Autoloader::loadClass() A
last analyzed 2018-10-19 17:34 UTC