Posted in PHP onDecember 31, 2017
实例如下所示:
$arr = array( 0=>array('key1'=>'value1' , 'key2'=>'value2'), 1=>array('key1'=>'value1' , 'key2'=>'value3'), 2=>array('key1'=>'value2' , 'key2'=>'value4'), 999=>array('key1'=>'value2' , 'key2'=>'value5') ); $result = array(); foreach ($arr as $data) { isset($result[$data['key1']]) || $result[$data['key1']] = array(); $result[$data['key1']][] = $data['key2']; } ksort($cityAr, SORT_NATURAL);//这个是键值按字母先后顺序排列 print_r($result); //输出如下 Array ( [value1] => Array ( [0] => value2 [1] => value3 ) [value2] => Array ( [0] => value4 [1] => value5 ) )
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PHP让数组中有相同值的组成新的数组实例
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