3v4l.org

run code in 300+ PHP versions simultaneously
<?php function sq(x) { return x * x; } ${'foo' . sq(2)} = 'bar'; echo $foo4;
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.6
Parse error: syntax error, unexpected ')', expecting variable (T_VARIABLE) in /in/AXDQl on line 3
Process exited with code 255.
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169.79 ms | 1395 KiB | 35 Q