3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A{}; class B{}; class A { B $b; } class B { A $a; }
Output for 5.4.0 - 5.4.17
Parse error: syntax error, unexpected 'B' (T_STRING), expecting function (T_FUNCTION) in /in/212F6 on line 8
Process exited with code 255.
Output for 5.3.0 - 5.3.27
Parse error: syntax error, unexpected T_STRING, expecting T_FUNCTION in /in/212F6 on line 8
Process exited with code 255.
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171.72 ms | 1399 KiB | 53 Q