3v4l.org

run code in 300+ PHP versions simultaneously
<?php $t = 'b'; $t =. 'a'; echo $t;
Output for 5.3.0 - 5.3.27, 5.4.0 - 5.4.20
Parse error: syntax error, unexpected '.' in /in/PZF9L on line 5
Process exited with code 255.
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176.31 ms | 1395 KiB | 56 Q