Usage analysis of in_array function in php, phpin_array_PHP tutorial

Usage analysis of in_array function in php, phpin_array

This article analyzes the usage of in_array function in PHP with examples. Share it with everyone for your reference. The details are as follows:

PHP is a weakly typed language. Try to bring the third parameter when using the IN_ARRAY function. The code is as follows:

Copy code 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 the first one: in_array(0,array('s','sss'),true) returns the value we want.

Use:

Copy code The code is as follows:

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

and:

Copy code The code is as follows:

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

Returning true is obviously not the value we want, because PHP is mainly a weak type, so it is better for everyone to pay attention to it before.

I hope this article will be helpful to everyone’s PHP programming design.

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