A simple sorting of multidimensional arrays in PHP_PHP tutorial

To sort by an element in a multi-dimensional array, it is very easy to implement in PHP. A function can call a callback function. You can also use PHP's own function

such as array_multisort($a,$ b), $a, $b are two arrays. If after sorting, the third element of $a array is ranked first, then the third element of $b will be ranked first regardless of its size in $b. In the first place. Take a look at the results of the program below:

The code is as follows

代码如下	复制代码
$a =array(100,80,50,10,0); $b = array("c","f","q","e","z"); array_multisort($a,$b); var_dump($a); var_dump($b); ?>

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代码如下	复制代码
array(5) { [0]=> int(0) [1]=> int(10) [2]=> int(50) [3]=> int(80) [4]=> int(100) } array(5) { [0]=> string(1) “z” [1]=> string(1) “e” [2]=> string(1) “q” [3]=> string(1) “f” [4]=> string(1) “c” }

$a =array(100,80,50,10,0);
$b = array("c","f","q","e","z");
array_multisort($a,$b);
var_dump($a);
var_dump($b);
?>

代码如下

复制代码

$arr = array(           'index'=>array( 'name'=>'首页','order'=>3),       'intro'=>array( 'name'=>'企业概况','order'=>2),       'news'=>array( 'name'=>'新闻动态','order'=>1 ),       'product'=>array( 'name'=>'产品中心','order'=>4 ),       'message'=>array( 'name'=>'访客留言','order'=>7 ),       'position'=>array( 'name'=>'人才招聘','order'=>6),       'contact'=>array( 'name'=>'联系我们','order'=> 5 )   );   uasort($arr, 'cmp');   public function cmp($a, $b){      return $a['order'] - $b['order'];   }

Run result:

The code is as follows

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array(5) { [0]=> int(0) [1]=> int(10) [2]=> int(50) [3]=> int(80) [4 ]=> int(100) }
array(5) { [0]=> string(1) “z” [1]=> string(1) “e” [2]=> string(1) “q” [3]=> string(1) “f” [4]=> string(1) “c” }

Custom function to implement sorting

The code is as follows

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$arr = array(  'index'=>array( 'name'=>'Homepage','order'=>3), 'intro'=>array( 'name'=>'Company Profile','order'=>2), 'news'=>array( 'name'=>'News','order'=>1 ), 'product'=>array( 'name'=>'Product Center','order'=>4 ), 'message'=>array( 'name'=>'Guest message','order'=>7 ), 'position'=>array( 'name'=>'Talent Recruitment','order'=>6), 'contact'=>array( 'name'=>'Contact us','order'=> 5 ) ); uasort($arr, 'cmp'); public function cmp($a, $b){ Return $a['order'] - $b['order']; } At this time $arr is sorted by order size, haha... http://www.bkjia.com/PHPjc/633103.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/633103.htmlTechArticleTo sort by an element in a multi-dimensional array, it is also very easy to implement in PHP. One function calls a The callback function is enough, or you can use PHP’s built-in functions such as array_multisor...