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<?php $data = array( array("foo" => array()), array("foo" => array(3,2)), array("foo" => array(3)), ); var_dump(array_filter($data, function($value) { return in_array(3,$value['foo']); }));
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(2) { [1]=> array(1) { ["foo"]=> array(2) { [0]=> int(3) [1]=> int(2) } } [2]=> array(1) { ["foo"]=> array(1) { [0]=> int(3) } } }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/GluHj on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/GluHj on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/GluHj on line 7
Process exited with code 255.

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