*array_walk

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。

注释：您可以通过把用户自定义函数中的第一个参数指定为引用：&$value，来改变数组元素的值（参见实例 2）。

提示：如需操作更深的数组（一个数组中包含另一个数组），请使用 array_walk_recursive 函数。

语法

array_walk(array,myfunction,parameter...)

技术细节

demo

#ex1
$array1 = [11,22,33,44,55,11,77];

function func1($val){
    echo  'this is v'.$val.'
';
}
show(array_walk($array1, 'func1'));
##输出
this is v11
this is v22
this is v33
this is v44
this is v55
this is v11
this is v77
bool(true)

#ex2
$array1 = [11,22,33,44,55,11,77];
function func2(&$val){
    $val =  'this is '.$val;
}
show($array1);
Array
(
    [0] => this is 11
    [1] => this is 22
    [2] => this is 33
    [3] => this is 44
    [4] => this is 55
    [5] => this is 11
    [6] => this is 77
)