3v4l.org

run code in 300+ PHP versions simultaneously
<?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"; } } }
Output for 4.3.3 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
numeric no_numeric matches non-numeric no_numeric matches numeric-append no_numeric matches
Output for 4.3.0 - 4.3.2
numeric no_numeric does not match non-numeric no_numeric does not match numeric-append no_numeric does not match

preferences:
229.35 ms | 401 KiB | 310 Q