3v4l.org

run code in 300+ PHP versions simultaneously
<?php $s = "ab"; $s1 = "cAbfAbe"; $s2 = $s1; do { $s2 = stristr($s2,$s); echo "$s2"."\n"; $s2 = substr($s2,0,count($s)+1).".\n"; echo "$s2"."\n"; } while ($s2 != false);

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49.4 ms | 402 KiB | 5 Q