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run code in 200+ php & hhvm versions
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<?php function _filterMetaFields($field) { return $field[0] !== '_'; } var_dump(array_filter(['test', '_test'], '_filterMetaFields'));
based on 8WLpf
Output for 5.4.0 - 7.2.0
array(1) { [0]=> string(4) "test" }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[', expecting ')' in /in/JNBoW on line 8
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[', expecting ')' in /in/JNBoW on line 8
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/JNBoW on line 8
Process exited with code 255.