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<?php $max = 9; $a = []; $a = [ 'min' => 10, 'max' => $max < $a['min'] ? $a['min'] : $max, ]; var_dump($a);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Warning: Undefined array key "min" in /in/AJSO8 on line 6 array(2) { ["min"]=> int(10) ["max"]=> int(9) }
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Notice: Undefined index: min in /in/AJSO8 on line 6 array(2) { ["min"]=> int(10) ["max"]=> int(9) }

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