3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo vsprintf('This is a string %$s', array(array('Waaa?'));
Output for 5.3.0 - 5.3.28, 5.4.0 - 5.4.31
Parse error: syntax error, unexpected ';' in /in/g2Fdo on line 3
Process exited with code 255.

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