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<?php $domd=new DOMDocument(); $str = "DOMDocument"; var_dump($domd instanceof $str); var_dump($domd instanceof ("DOMDocument")); // ^ is legal. // V is illegal // var_dump($domd instanceof "DOMDocument"); $code = ' var_dump($domd instanceof ("DOMDocument")); '; eval($code); // the eval hack is for illustration, make it an error at run-time, rather than compile-time.
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.24, 8.3.0 - 8.3.12
bool(true) bool(true) bool(true)
preferences:
59.91 ms | 406 KiB | 5 Q