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Homephp教程php手册php中使用array_filter()函数过滤空数组的实现代码

这篇文章主要介绍了php中使用array_filter()函数过滤空数组的实现代码,这是浏览PHP手册时无意发意的一个有意思的array_filter()函数用法,需要的朋友可以参考下

今天在翻看手册查询array_filter()的使用细节时,看到了个小关键点:If no callback is supplied, all entries of input equal to FALSE (see converting to boolean) will be removed. 如果没有给出回调函数,所有的等于 FALSE 的元素将会被移除掉,,这不正好可以用来过滤一些有空元素的数组吗?连忙写个例子测试一下想法:

复制代码 代码如下:


$entry = array( 

             0 => '蓝色夏威夷的博客', 

             1 => false, 

             2 => 1, 

             3 => null, 

             4 => '', 

             5 => 'http://www.jb51.net', 

             6 => '0',

             7 => array(),

             8 => 0

          );

$validarr = array_filter($entry);

print_r($validarr);

//输出结果:

Array

(

    [0] => 蓝色夏威夷的博客

    [2] => 1

    [5] =>

)


一些可以转化为布尔型FALSE的数组元素都被移除了,对我们想要得到一个有效的数组作了一个非常全面的过滤。
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