3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = ["a"->1,"b"->2]; echo $foo["a"];
Output for 7.0.0 - 7.0.2
Parse error: syntax error, unexpected '1' (T_LNUMBER), expecting identifier (T_STRING) or variable (T_VARIABLE) or '{' or '$' in /in/g2YcP on line 3
Process exited with code 255.
Output for 5.5.24 - 5.5.31, 5.6.8 - 5.6.17
Parse error: syntax error, unexpected '->' (T_OBJECT_OPERATOR), expecting ']' in /in/g2YcP on line 3
Process exited with code 255.
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