Usage Analysis of in_array Function in php

In this paper, the usage of in_array function in php is analyzed with examples. Share it for your reference. The details are as follows:

PHP is a weakly typed language. When using the IN_ARRAY function, take the third parameter as much as possible. The code is as follows:

var_dump(in_array(0,array('s','sss'),true)); // return false   

 

var_dump(in_array(0,array('s','sss')));       // return true   

 

var_dump(in_array(0,array(1,2,3)));          // return false

It can be seen from the above three functions that when the first one, in_array (0, array ('s', 'sss'), true), returns the value we want.

Use:

var_dump(in_array(0,array('s','sss')));

And:

var_dump(in_array(0,array(1,2,3)));

Returning ture is obviously not the value we want, because PHP is mainly of weak type, so it is better for you to pay attention to 1 before.

I hope this article is helpful to everyone's php programming.