如何匹配PHP数组中的值，然后找到键值? [英] how to match value in PHP array and then find key value?

问题描述

我有一个数组变量$colorArray = array('red','white','blue');

假设$color = "red";，如何将$ color的值与$ colorArray匹配，然后找到对应的键值"red"?找到键值"red"后，需要将键值存储在另一个变量中以供其他用途.

Suppose $color = "red";, how do I match the value of $color with $colorArray and then find the corresponding key value of "red"? After I find the key value of "red", I would then need to store the key value in another variable for other uses.

推荐答案

使用 array_search() .

$key = array_search($color, $colorArray);

为确保匹配，请确保将其与FALSE进行比较，而不仅仅是 falsy .

To ensure you got a match, make sure you compare it to FALSE and not just falsy.

if ($key !== FALSE) {
   // Match made.
}

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