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<?php |
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declare(strict_types=1); |
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namespace Smoren\PartialIntersection\Util; |
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use Closure; |
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use Generator; |
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/** |
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* Tool for extracting unique IDs and hashes of any PHP variables and data structures. |
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* |
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* Based on PHP Type Tool's UniqueExtractor. |
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* @see https://github.com/Smoren/type-tools-php |
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* @see https://github.com/Smoren/type-tools-php/blob/master/src/UniqueExtractor.php |
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*/ |
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class UniqueExtractor |
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{ |
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/** |
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* Returns unique ID string of given variable by its value and type. |
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* |
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* If $strict is true: |
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* - scalars: result is unique strictly by type; |
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* - objects: result is unique by instance; |
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* - arrays: result is unique by serialized value; |
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* - resources: result is unique by instance. |
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* |
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* If $strict is false: |
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* - scalars: result is unique by value; |
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* - objects: result is unique by serialized value; |
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* - arrays: result is unique by serialized value. |
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* - resources: result is unique by instance. |
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* |
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* @param mixed $var |
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* @param bool $strict |
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* |
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* @return string |
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*/ |
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public static function getString($var, bool $strict): string |
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{ |
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switch (true) { |
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169 |
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case is_array($var): |
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return 'array_'.serialize($var); |
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153 |
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case is_resource($var): |
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preg_match('/#([0-9]+)$/', (string)$var, $matches); |
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return 'resource_'.$matches[1]; |
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case $var instanceof Generator: |
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return 'generator_'.spl_object_id($var); |
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case $var instanceof Closure: |
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return 'closure_'.spl_object_id($var); |
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case is_object($var): |
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return 'object_'.($strict ? spl_object_id($var) : serialize($var)); |
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case gettype($var) === 'boolean': |
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return 'boolean_'.(int)$var; |
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case $strict: |
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return gettype($var).'_'.$var; |
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case !$var: |
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return 'boolean_0'; |
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case strval($var) === '1': |
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return 'boolean_1'; |
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case is_numeric($var): |
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return 'numeric_'.(float)$var; |
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default: |
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return 'scalar_'.$var; |
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} |
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} |
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} |
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Smoren /
partial-intersection-php
