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run code in 200+ php & hhvm versions
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<?php $user_email = 'asd@toyota.com'; $re_to = "[^@]+@[^@]+"; //"[^@]+@[^@]*toyota[^@]*\.[^@]+"; $re_to = ".+"; $regex = preg_quote($re_to, '#'); $res = preg_match("$regex#i", $user_email); echo $res ? '1' : '0';
Output for 4.3.11 - 7.2.0
Warning: preg_match(): Delimiter must not be alphanumeric or backslash in /in/Ae2EE on line 12 0
Output for 4.3.0 - 4.3.10
Warning: Delimiter must not be alphanumeric or backslash in /in/Ae2EE on line 12 0