<?php
$arr = [
['2','3'],
['6,7']
];
$s= array_walk($arr, function($_value,$_key){
$a = 10;
return true;
});
var_dump($a);//$a 打印的时候报错了,如何得到$a呢?
<?php
$arr = [
['2','3'],
['6,7']
];
$a = 0;
$s = array_walk($arr, function($_value,$_key) use (&$a) {
$a = 10;
return true;
});
var_dump($a);