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run code in 300+ PHP versions simultaneously
<?php $row = array( 'useless' => 42, 'useful' => 'orange', 'useless_too' => 'banana', 'useful_too' => 'apples'); foreach ($row as $value){ $pos = strpos($value,'useful'); echo $pos; }

preferences:
42.21 ms | 402 KiB | 5 Q