PHP array_walk() 函数

Posted 2020-10-29 与f

 

定义和用法

array_walk() 函数对数组中的每个元素应用用户自定义函数。在函数中，数组的键名和键值是参数。

<?php
function myfunction($value,$key,$p)
{
echo "$key $p $value<br>";
}
$a=array("a"=>"red","b"=>"green","c"=>"blue");
array_walk($a,"myfunction","has the value");
?>

结果

a has the value red
b has the value green
c has the value blue

其实传参，数组哪里($value)可以加个&,那就代表引用(指针)，把原始数组也更改了.

 

<?php
function myfunction(&$value,$key,$p)
{
echo "$key $p $value<br>";
}
$a=array("a"=>"red","b"=>"green","c"=>"blue");
array_walk($a,"myfunction","has the value");
?>

 

 

参考：http://www.runoob.com/php/func-array-walk.html