[英]PHP Get value of a level in multidimensional array using function arguments as “path”
我有一个N级的多维数组,如下所示:
$a = array(
'a'=>1,
'b'=>array(
'x'=>array(
'p'=>array(
't'=>2
)
)
),
'c'=>3
);
如何使用函数中的参数数组通过“路径”获取值?
function get(){
$args = func_get_args();
$b = (global) $a;
// ????
}
$v = get('b','x','p'); // expected: Array ( [t] => 2 )
function get() {
global $a;
$current = $a;
$args = func_get_args();
foreach($args as $key) {
$current = $current[$key];
}
return $current;
}
这样做的PHP方式更多:
function array_get_path(array $array, $path) {
$current = $array;
if(!empty($path)) {
foreach($path as $elem) {
if(isset($current[$elem])) {
$current = &$current[$elem];
} else {
return $current;
}
}
}
return $current;
}
一次遍历参数数组一个元素:
function get() {
global $a;
$args = func_get_args();
$currentElement = $a;
foreach ($args as $index) {
$currentElement = $currentElement[$index];
}
return $currentElement;
}
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