3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array(12,43,66,21,56,43,43,78,78,100,43,43,43,21); foreach($arr as $key=>$item){ if(array_count_values($arr)[$item] > 1){ echo "Found Matched value : ".$item."\n"; } }
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Found Matched value : 43 Found Matched value : 21 Found Matched value : 43 Found Matched value : 43 Found Matched value : 78 Found Matched value : 78 Found Matched value : 43 Found Matched value : 43 Found Matched value : 43 Found Matched value : 21
preferences:
106.48 ms | 403 KiB | 121 Q