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php中in_array函数用法分析_PHP

May 31, 2016 pm 07:27 PM
in_array php function usage

本文实例分析了php中in_array函数用法。分享给大家供大家参考。具体如下:

PHP是弱类型语言 在使用IN_ARRAY函数时尽量带上第三个参数,代码如下:

代码如下:

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


从上面的三个函数可以看出来当,第一个:in_array(0,array('s','sss'),true),返回是我们想要的值.

使用:

代码如下:

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

与:

代码如下:

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

返回ture明显不是我们要的值了,因为主要是PHP为弱类型所以以前各位还是注意一些比较好了.

希望本文所述对大家的php程序设计有所帮助。

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