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php中in_array函数用法分析 - 站长搜索
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php中in_array函数用法分析

PHP 2014-12-14 20:00:09 转载来源: 网络整理/侵权必删

本文为大家讲解的是php中in_array函数用法分析,感兴趣的同学参考下. 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:   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)

本文为大家讲解的是phpin_array函数用法分析,感兴趣的同学参考下.

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:

 
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:

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

与:

 
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.


标签: php in array 函数 用法 分析


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