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run code in 150+ php & hhvm versions
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<?php $test_uniqids = array( 'numeric' => "\x00"."5425368523947", 'non-numeric' => "\x00"."54253685ed947", 'numeric-append' => "\x00"."5425368523947x" ); foreach ($test_uniqids as $test => $uniqid) { print $test"\t"; print is_numeric($uniqid) ? 'is_numeric' : 'no_numeric'; print "\t"; $vals = array(); $vals[$uniqid] = TRUE; foreach ($vals as $key => $val) { if ($key === $uniqid) { print "matches\n"; } else { print "does not match\n"; } } }
based on 6dAMj
Output for 5.4.0 - 5.4.32
Parse error: syntax error, unexpected '"\t"' (T_CONSTANT_ENCAPSED_STRING) in /in/s9WB8 on line 9
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected T_CONSTANT_ENCAPSED_STRING in /in/s9WB8 on line 9
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_CONSTANT_ENCAPSED_STRING in /in/s9WB8 on line 9
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/s9WB8 on line 9
Process exited with code 255.