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This article introduces the knowledge of "how to find key names through values in php arrays". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

The php array can find the corresponding key name (key) by value. Two search methods: 1, with "array_search (value, array)", will return the corresponding key name; 2, with "foreach ($arr as $k = > $v) {if ($vault = value) {echo $k;}}", you can output the corresponding key name.

Operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

The php array can find the corresponding key name (key) by value.

The following article will introduce you to two search methods.

Method 1: use the array_search () function

The array_search () function searches the array for the specified key value and returns the corresponding key name.

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