3v4l.org

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<?php $t = array( 0, '0', '', null, false, array(), ); foreach ($t as $i => $v) { if ($v == NULL) { echo "$i : " . print_r($v, TRUE) . " IS NULL\n"; } else { echo "$i : " . print_r($v, TRUE) . " is not NULL\n"; } }
Output for 4.3.0 - 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, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 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
0 : 0 IS NULL 1 : 0 is not NULL 2 : IS NULL 3 : IS NULL 4 : IS NULL 5 : Array ( ) IS NULL
preferences:
331.34 ms | 406 KiB | 459 Q