php中in_array函数用法分析_PHP
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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