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<?php $a = [ [ 'foo' => 1.0 ], [ 'foo' => 2.5 ], [ 'foo' => 3 ], [ 'foo' => '4' ], ]; var_dump(array_column($a, 'foo', 'foo'));
Output for 8.1.0 - 8.1.10
Deprecated: Implicit conversion from float 2.5 to int loses precision in /in/Yvaup on line 9 array(4) { [1]=> float(1) [2]=> float(2.5) [3]=> int(3) [4]=> string(1) "4" }
Output for 7.1.21 - 7.1.24, 7.2.9 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.30, 8.0.0 - 8.0.23
array(4) { [1]=> float(1) [2]=> float(2.5) [3]=> int(3) [4]=> string(1) "4" }
Output for 5.6.38, 7.1.0 - 7.1.20, 7.2.0 - 7.2.8
array(4) { [0]=> float(1) [1]=> float(2.5) [3]=> int(3) [4]=> string(1) "4" }

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