3v4l.org

run code in 300+ PHP versions simultaneously
<?php $ar = Array ( 0 =>'{"a":"b", "c":"d", "h":"e"}', 1 =>'{"a":"b", "f":"g"}' ); foreach($ar as $in=>&$js){ $ar[$in] = json_decode($js,true); } print_r($ar); $diff = array_diff($ar[1],array_diff($ar[1],$ar[0])); print_r($diff); foreach($diff as $ind=>$uns){ unset($ar[1][$ind]); } print_r($ar); foreach($ar as $in=>&$js){ $ar[$in] = json_encode($js); } print_r($ar);
Output for 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Array ( [0] => Array ( [a] => b [c] => d [h] => e ) [1] => Array ( [a] => b [f] => g ) ) Array ( [a] => b ) Array ( [0] => Array ( [a] => b [c] => d [h] => e ) [1] => Array ( [f] => g ) ) Array ( [0] => {"a":"b","c":"d","h":"e"} [1] => {"f":"g"} )
preferences:
139.45 ms | 408 KiB | 5 Q