Custom array sorting function and sorting class method implemented in PHP

This article mainly introduces the custom array sorting function and sorting class implemented in PHP, and analyzes the related implementation skills of PHP's custom two-dimensional array sorting function and sorting class in the form of examples. Friends in need can refer to the following

The details are as follows:

/* * 二维数组自定义排序函数 * uasort($arr,function_name) * **/ $arr = array( array('a'=>1,'b'=>'c'), array('a'=>4,'b'=>'a'), array('a'=>5,'b'=>'g'), array('a'=>7,'b'=>'f'), array('a'=>6,'b'=>'e') ); function compare_arr($x,$y){ if($x['b']<$y['b']){ return -1; }else if($x['b']>$y['b']){ return 1; }else{ return 0; } } uasort($arr,'compare_arr'); foreach($arr as $a){ echo $a['a'].'=>'.$a['b'].'
'; }

Custom sorting class in the manual:

class multiSort { var $key; //key in your array //排序函数 参数依次是 数组 待排列索引 排序类型 function run ($myarray, $key_to_sort, $type_of_sort = '') { $this->key = $key_to_sort; if ($type_of_sort == 'desc') uasort($myarray, array($this, 'myreverse_compare')); else uasort($myarray, array($this, 'mycompare')); return $myarray; } //正序 function mycompare($x, $y) { if ( $x[$this->key] == $y[$this->key] ) return 0; else if ( $x[$this->key] < $y[$this->key] ) return -1; else return 1; } //逆序 function myreverse_compare($x, $y) { if ( $x[$this->key] == $y[$this->key] ) return 0; else if ( $x[$this->key] > $y[$this->key] ) return -1; else return 1; } }

The above is the entire content of this article, I hope it will be helpful to everyone's study.

Related recommendations:

Detailed explanation of the method of storing/depositing PHPSession into redis

phpMethods to obtain parameters in cli mode

##phpMethods to improve efficiency by finding array elements

The above is the detailed content of Custom array sorting function and sorting class method implemented in PHP. For more information, please follow other related articles on the PHP Chinese website!