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Re:PHP: md5('240610708') == md5('QNKCDZO') by josteink on Monday May 04, 2015 @08:59AM (#9485822)
php_real_equivalence_4()
Re:PHP: md5('240610708') == md5('QNKCDZO') by tellor on Tuesday May 05, 2015 @08:48AM (#9492137)
Exactly!

But it must invoke with additional NULL-parameter to achieve real effect and analyse return value for TRUE, FALSE, NULL:

  php_real_equivalence_4($x, $y, null);
Re:PHP: md5('240610708') == md5('QNKCDZO') by DonHopkins on Tuesday May 05, 2015 @09:00AM (#9492198)
Except they had to call it php_real_equivalnce_4() because php_real_equivalence_4() was taken.