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<?php $word = 'WORLD'; $ph = '_____'; $word = str_split($word); $ph = str_split($ph); var_dump($word, $ph, preg_grep($word, 'O'));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: preg_grep(): Argument #1 ($pattern) must be of type string, array given in /in/q0OvZ:9 Stack trace: #0 /in/q0OvZ(9): preg_grep(Array, 'O') #1 {main} thrown in /in/q0OvZ on line 9
Process exited with code 255.

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