3v4l.org

run code in 300+ PHP versions simultaneously
<?php mb_internal_encoding("UTF-8"); $ = 'foo'; $x = 'bar'; echo $ . $x;
Output for 5.4.0 - 5.4.11
Parse error: syntax error, unexpected '=', expecting variable (T_VARIABLE) or '$' in /in/pGq8S on line 5
Process exited with code 255.
Output for 5.3.0 - 5.3.21
Parse error: syntax error, unexpected '=', expecting T_VARIABLE or '$' in /in/pGq8S on line 5
Process exited with code 255.
preferences:
171.38 ms | 1395 KiB | 41 Q