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<?php echo Module::work('hello world.'), "\n"; echo MyModule::work('hello world.'); abstract class Module { private static $mask = '[[[%s]]]'; public static function work($it) { return preg_replace_callback('~\w+~', array('self', 'self::replace'), $it); } protected static function replace($matches) { return sprintf(self::$mask, $matches[0]); } } abstract class MyModule extends Module { private static $mask = '{{{%s}}}'; protected static function replace($matches) { return sprintf(self::$mask, $matches[0]); } }
Output for 5.1.2 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
[[[hello]]] [[[world]]]. [[[hello]]] [[[world]]].
Output for 5.0.0 - 5.1.1
<br /> <b>Warning</b>: preg_replace_callback() [<a href='function.preg-replace-callback'>function.preg-replace-callback</a>]: requires argument 2, 'self::self::replace', to be a valid callback in <b>/in/GLpdY</b> on line <b>10</b><br /> hello world. <br /> <b>Warning</b>: preg_replace_callback() [<a href='function.preg-replace-callback'>function.preg-replace-callback</a>]: requires argument 2, 'self::self::replace', to be a valid callback in <b>/in/GLpdY</b> on line <b>10</b><br /> hello world.
Output for 4.4.2 - 4.4.9
<br /> <b>Parse error</b>: syntax error, unexpected T_CLASS in <b>/in/GLpdY</b> on line <b>5</b><br />
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
<br /> <b>Parse error</b>: parse error, unexpected T_CLASS in <b>/in/GLpdY</b> on line <b>5</b><br />
Process exited with code 255.
Output for 4.3.2 - 4.3.4
<br /> <b>Parse error</b>: parse error in <b>/in/GLpdY</b> on line <b>5</b><br />
Process exited with code 255.