3v4l.org

run code in 300+ PHP versions simultaneously
<?php $search = 'Hello world.'; $test = 'world'; $pos = strpos($search, $test); echo $pos + "\r\n"; if (!$pos) echo "1. Not found"; else echo "1. Found"; echo "\r\n"; if ($pos != true) echo "2. Not found"; else echo "2. Found"; echo "\r\n"; if ($pos === false) echo "3. Not found"; else echo "3. Found"; echo "\r\n"; if ($pos == false) echo "4. Not found"; else echo "4. Found"; ?>

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54.89 ms | 402 KiB | 5 Q