排序在爆炸可變

Question

大家好我有一個小問題與PHP排序我基本上是一個可變的例子

$ciao ="4,v@2,f@1,x@22,a"; // Can have other elements 
$prova = explode("@",$ciao); 
rsort($prova); 
echo $prova[0]; 

但這不在4，V相反，我想這樣1，X

Answer 1

使用sort()簡單。

<?php 
$ciao ="4,v@2,f@1,x@22,a"; // Can have other elements 
$prova = explode("@",$ciao); 
sort($prova); 
echo $prova[0]; // Prints 1,x 
?> 

See it working live

Answer 2

看看http://php.net/manual/en/function.sort.php，在這裏你可以使用第二個參數即sort_flags

$ciao ="4,v@2,f@1,x@22,a"; // Can have other elements 
$prova = explode("@",$ciao); 
sort($prova, SORT_STRING); //SORT_STRING - compare items as strings 
print_r($prova); 

sort($prova, SORT_NUMERIC); //SORT_NUMERIC - compare items numerically 
print_r($prova); 

輸出

Array 
(
    [0] => 1,x 
    [1] => 2,f 
    [2] => 22,a 
    [3] => 4,v 
) 
Array 
(
    [0] => 1,x 
    [1] => 2,f 
    [2] => 4,v 
    [3] => 22,a 
)