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<?php //Source https://bugs.php.net/bug.php?id=62328 class UberSimpleXML extends SimpleXMLElement { public function __toString() { return 'stringification'; } } $xml = new UberSimpleXML('<xml/>'); $xml->tag = "stuff"; echo "\nno cast: ". $xml; echo "\ncast: ". (string)$xml; echo "\nexplicit call:". $xml->__toString(); var_dump((string) $xml); var_dump($xml->__toString());
Output for git.master, git.master_jit, rfc.property-hooks
no cast: stringification cast: stringification explicit call:stringificationstring(15) "stringification" string(15) "stringification"

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