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<?php $values = array('1','2'); var_dump(empty((array_filter('is_array', $values)))); var_dump(isset($values[0]), $values[0]); var_dump(isset($values[0][0]), $values[0][0]);
Output for 5.5.0 - 7.2.0
Warning: array_filter() expects parameter 1 to be array, string given in /in/oG9jV on line 3 bool(true) bool(true) string(1) "1" bool(true) string(1) "1"
Output for 5.3.0 - 5.4.45
Parse error: syntax error, unexpected '(' in /in/oG9jV on line 3
Process exited with code 255.
Output for 5.1.0 - 5.2.17
Parse error: syntax error, unexpected '(', expecting T_STRING or T_VARIABLE or '$' in /in/oG9jV on line 3
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '(', expecting T_STRING or T_VARIABLE or '$' in /in/oG9jV on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '(', expecting T_VARIABLE or '$' in /in/oG9jV on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected '(', expecting T_VARIABLE or '$' in /in/oG9jV on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_VARIABLE' or `'$'' in /in/oG9jV on line 3
Process exited with code 255.