PHP按二維數組中的某個值重新排序數組 usort的使用方法

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$arr[0] = [‘aa‘=>123,‘bb‘=>‘abc‘];$arr[1] = [‘aa‘=>456,‘bb‘=>‘dfe‘];usort($arr,ss(‘aa‘));function ss($key){    return function ($a,$b) use ($key) {        return $a[$key] < $b[$key];     //通過改變大於、小於來正向反向排序    };}var_dump($arr);/** 結果array (size=2)  0 =>     array (size=2)      ‘aa‘ => int 456      ‘bb‘ => string ‘dfe‘ (length=3)  1 =>     array (size=2)      ‘aa‘ => int 123      ‘bb‘ => string ‘abc‘ (length=3)*/

<?php $arr = array(    0 => array(‘id‘ => ‘2014347856‘, ‘name‘ => ‘張甜‘, ‘科目‘ => ‘語文‘, ‘tag‘ => ‘期中考試‘, ‘成績‘ => ‘142‘),    1 => array(‘id‘ => ‘2014347856‘, ‘name‘ => ‘張甜‘, ‘科目‘ => ‘數學‘, ‘tag‘ => ‘期中考試‘, ‘成績‘ => ‘98‘),    2 => array(‘id‘ => ‘2014347856‘, ‘name‘ => ‘張甜‘, ‘科目‘ => ‘英語‘, ‘tag‘ => ‘期中考試‘, ‘成績‘ => ‘118‘),    3 => array(‘id‘ => ‘2014347856‘, ‘name‘ => ‘張甜‘, ‘科目‘ => ‘化學‘, ‘tag‘ => ‘期中考試‘, ‘成績‘ => ‘78‘),    4 => array(‘id‘ => ‘2014347856‘, ‘name‘ => ‘張甜‘, ‘科目‘ => ‘物理‘, ‘tag‘ => ‘期中考試‘, ‘成績‘ => ‘132‘),    5 => array(‘id‘ => ‘2014347856‘, ‘name‘ => ‘張甜‘, ‘科目‘ => ‘生物‘, ‘tag‘ => ‘期中考試‘, ‘成績‘ => ‘115‘),    6 => array(‘id‘ => ‘2014347856‘, ‘name‘ => ‘張甜‘, ‘科目‘ => ‘地理‘, ‘tag‘ => ‘期中考試‘, ‘成績‘ => ‘99‘),    7 => array(‘id‘ => ‘2014347856‘, ‘name‘ => ‘張甜‘, ‘科目‘ => ‘曆史‘, ‘tag‘ => ‘期中考試‘, ‘成績‘ => ‘88‘),    8 => array(‘id‘ => ‘2014347856‘, ‘name‘ => ‘張甜‘, ‘科目‘ => ‘政治‘, ‘tag‘ => ‘期中考試‘, ‘成績‘ => ‘125‘),    9 => array(‘id‘ => ‘2014347880‘, ‘name‘ => ‘李鳴‘, ‘科目‘ => ‘語文‘, ‘tag‘ => ‘期中考試‘, ‘成績‘ => ‘79‘),    10 => array(‘id‘ => ‘2014347880‘, ‘name‘ => ‘李鳴‘, ‘科目‘ => ‘數學‘, ‘tag‘ => ‘期中考試‘, ‘成績‘ => ‘148‘),    11 => array(‘id‘ => ‘2014347880‘, ‘name‘ => ‘李鳴‘, ‘科目‘ => ‘英語‘, ‘tag‘ => ‘期中考試‘, ‘成績‘ => ‘142‘),);/*自訂排序*/function userSort($a, $b){    if ($a[‘name‘] == $b[‘name‘]) {        /*排序科目*/        $subjectSort = array(‘語文‘, ‘數學‘, ‘英語‘, ‘曆史‘, ‘政治‘, ‘地理‘, ‘物理‘, ‘化學‘, ‘生物‘);        foreach ($subjectSort as $index => $item) {            if ($a[‘科目‘] == $item) {                $tmp1 = $index;            }            if ($b[‘科目‘] == $item) {                $tmp2 = $index;            }        }         return $tmp1 < $tmp2 ? -1 : 1;    } else {        /*排序name*/        $tmpArr = array($a[‘name‘], $b[‘name‘]);        sort($tmpArr);         return $a[‘name‘] == $tmpArr[0] ? -1 : 1;    }} usort($arr, ‘userSort‘); var_dump($arr);

 

PHP按二維數組中的某個值重新排序數組 usort的使用方法