3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo (echo 'hello');;
Output for 5.6.38, 7.1.0 - 7.1.23, 7.2.0 - 7.2.11
Parse error: syntax error, unexpected 'echo' (T_ECHO) in /in/NgD5q on line 1
Process exited with code 255.
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150.92 ms | 1238 KiB | 6 Q