How does php find a value in an array
In this article Xiaobian for you to introduce in detail "php how to find a value in the array", the content is detailed, the steps are clear, the details are handled properly, I hope this "php how to find a value in the array" article can help you solve your doubts, the following follow the editor's ideas slowly in-depth, together to learn new knowledge.
Search method: 1, use "in_array ($search,$arr,$type)" statement; 2, use "array_search ($search,$arr,$type)" statement; 3, use "array_key_exists ($search,$arr)" statement.
Operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer
The method of finding a value in an array by php
Method 1: use the in_array () function
The in_array () function searches for the existence of the specified value in the array.
Method 2:array_search () function
The array_search () function, like in_array (), looks for a key value in the array. If the value is found, the key name of the matching element is returned. If it is not found, false is returned.
Method 3: use the array_key_exists () function
The array_key_exists () function checks whether the specified key name exists in an array, returns true if the key name exists, and false if the key name does not exist.
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