3v4l.org

run code in 300+ PHP versions simultaneously
<?php $modes = ['a', 'a+', 'w', 'w+', 'r+', 'x', 'x+', 'c', 'c+']; foreach($modes as $mode) { $stream = fopen('php://memory', $mode); $stats = stream_get_meta_data($stream); echo $mode.' => '.$stats['mode']; }
Output for git.master, git.master_jit, rfc.property-hooks
a => a+ba+ => a+bw => w+bw+ => w+br+ => w+bx => rbx+ => w+bc => rbc+ => w+b

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