Created
August 2, 2012 11:36
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PHP Multiple Inheritance
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| <?php | |
| class A { | |
| function x() { echo 'Ich bin Klasse A'; } | |
| } |
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| <?php | |
| class B { | |
| function y() { echo 'Ich bin Klasse B'; } | |
| } |
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| <?php | |
| class C extends A, B { | |
| // Blubb | |
| } |
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| <?php | |
| function __autoload($class_name) { | |
| if (!file_exists($class_name . '.php')) return; | |
| $file = file_get_contents($class_name . '.php'); | |
| $file = substr($file, 5); | |
| preg_match_all('/class [[:alnum:]]+ extends [[:alnum:], ]+/i', $file, $classes, PREG_OFFSET_CAPTURE); | |
| if (count($classes[0]) == 0) { | |
| $file2 = $file; | |
| } else { | |
| $file2 = ''; | |
| $lastPos = 0; | |
| foreach ($classes as $class) { | |
| if (!is_array($class) || count($class) == 0) continue; | |
| $class = $class[0]; | |
| $file2 .= substr($file, $lastPos, $class[1]); | |
| $lastPos = $class[1] + strlen($class[0]); | |
| $file2 .= substr($class[0], 0, strpos($class[0], ' extends')) . ' {'; | |
| $extends = substr($class[0], strpos($class[0], ' extends') + 8); | |
| $extends = explode(',', $extends); | |
| foreach ($extends as $extend) { | |
| $extend = trim($extend); | |
| if (strlen($extend) < 1) continue; | |
| if (!class_exists($extend)) { | |
| __autoload($extend); | |
| } | |
| $includeFile = file_get_contents($extend . '.php'); | |
| $includeFile = substr($includeFile, strpos($includeFile, '{') + 1); | |
| $includeFile = substr($includeFile, 0, strrpos($includeFile, '}')); | |
| $file2 .= $includeFile; | |
| } | |
| $file2 .= substr($file, $class[1] + strlen($class[0]) + 1); | |
| } | |
| } | |
| eval($file2); | |
| } | |
| $c = new C(); | |
| $c->x(); | |
| $c->y(); |
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Multiple inheritance is bad and you should feel bad :)