3v4l.org

run code in 300+ PHP versions simultaneously
<?php $filter = 'ololo'; $k = "fil.ter"'; echo ${$k};
Output for 5.4.0 - 5.4.16
Parse error: syntax error, unexpected '';' (T_ENCAPSED_AND_WHITESPACE) in /in/eJkDU on line 3
Process exited with code 255.
Output for 5.3.0 - 5.3.26
Parse error: syntax error, unexpected T_ENCAPSED_AND_WHITESPACE in /in/eJkDU on line 3
Process exited with code 255.
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174.9 ms | 1395 KiB | 51 Q