php 在简单数组中查找元素的位置
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Finding the position of an element in a simple array
提问by Psyche
Let's say we have this array:
假设我们有这个数组:
Array ( [0] => 10 [1] => 45 [2] => 23 )
How can I determine the position of element '45' in this array?
如何确定此数组中元素“45”的位置?
I'm using PHP.
我正在使用 PHP。
Thank you.
谢谢你。
回答by Gumbo
Use array_search
to get the key to a value:
使用array_search
得到的关键价值:
$key = array_search(45, $arr);
And if you want to get its position in the array, you can search for the index of the key in the array of keys:
如果你想得到它在数组中的位置,你可以在键的数组中搜索键的索引:
$offset = array_search($key, array_keys($arr));
So with an array like the following you will still get 1
as result:
因此,使用如下所示的数组,您仍然会得到1
结果:
$arr = array('foo' => 10, 'bar' => 45, 'baz' => 23);
回答by Felix Kling
Google to the rescue: array_search
谷歌救援: array_search