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<?php $array = array( 0 => array( 'key1' => '123', 'key2' => 'values we', 'key3' => 'do not', 'key4' => 'care about' ), 1 => array( 'key1' => '124', 'key2' => 'values we', 'key3' => 'do not', 'key4' => 'care about' ), 2 => array( 'key1' => '125', 'key2' => 'values we', 'key3' => 'do not', 'key4' => 'care about' ) ); echo max(array_column($array, 'key1'));
Output for 5.5.4, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.30, 8.0.0 - 8.0.20, 8.1.0 - 8.1.7
125
Output for 5.1.6, 5.2.0
Fatal error: Call to undefined function array_column() in /in/U8Re6 on line 24
Process exited with code 255.
Output for 4.3.0
Fatal error: Call to undefined function: array_column() in /in/U8Re6 on line 24

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