Search_array在嵌套数组 [英] Search_array in nested arrays
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问题描述
我已经得到了与嵌套数组的数组,我试图使用* search_array *函数通过数组进行筛选,并给我回钥匙。它一直没有工作。这里的code:
I've got an array with nested arrays, and I was trying to use the *search_array* function to sift through the array and give me back their keys. It hasn't been working. Here's the code:
<?php
$array = array(
'cat1' => array(1,2,3),
'cat2' => array(4,5,6),
'cat3' => array(7,8,9),
);
foreach($array as $cat){
if(is_array($cat)
echo array_search(5,$cat); //want it to return 'cat2'
else
echo array_search(5,$array);
}
谢谢!
推荐答案
如果你总是有一个二维数组,那么它是那么容易,因为:
If you always have a two-dimensional array, then it is as easy as:
function find($needle, $haystack) {
foreach($haystack as $key=>$value){
if(is_array($value) && array_search($needle, $value) !== false) {
return $key;
}
}
return false;
}
$cat = find(5, $array);
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