PHP array introductory tutorial in_array() function

This article introduces the usage of the in_array() function of the PHP array function. Friends in need can refer to it.

In the php array function, the in_array() function searches for a specific value in an array and returns true if the value is found, otherwise it returns false.

The form is as follows: boolean in_array(mixed needle,array haystack[,boolean strict]);

Example, find whether the variable apple is already in the array, if so, output a piece of information:

<?php
//in_array用法举例
//by bbs.it-home.org
$fruit = "apple";   
$fruits = array("apple","banana","orange","pear");   
if( in_array($fruit,$fruits) )
echo "$fruit 已经在数组中";  
?>

Instructions: The third argument is optional and forces in_array() to consider types when searching.