3v4l.org

run code in 300+ PHP versions simultaneously
<?php $replacement = "1"; $final = substr($string, 0, 1).$replacement; echo $final'
Output for 7.0.0 - 7.0.25, 7.1.0 - 7.1.11
Parse error: syntax error, unexpected ''' (T_ENCAPSED_AND_WHITESPACE), expecting ',' or ';' in /in/Fg3JN on line 5
Process exited with code 255.
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188.28 ms | 1395 KiB | 45 Q