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<?php $unique = [null, '', .0, false, null, 0, '0.0', -.1, "\0", false]; $duplicated=array(); foreach($unique as $k=>$v) { if( ($kt=array_search($v,$unique))!==false and $k!=$kt ) { unset($unique[$kt]); $duplicated[]=$v; } } var_export($unique); var_export($duplicated);
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
array ( 6 => '0.0', 7 => -0.1, 8 => '' . "\0" . '', 9 => false, )array ( 0 => '', 1 => false, 2 => NULL, 3 => 0, 4 => '0.0', 5 => false, )
preferences:
69.03 ms | 407 KiB | 5 Q