PHPize Online / SQLize Online  /  SQLtest Online

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<? $ar['a'] = [1 => 15, 2 => 20, 3 => 19]; $ar['b'] = [1 => 2, 2 => 20, 3 => 3]; $ar['c'] = [1 => 3, 2 => 19, 3 => 31]; print_r($ar); asort($ar['a']); foreach($ar['a'] as $k -> $z) { echo $k.' '; } //print_r($ar);
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