How to remove empty array elements in php

王林
Release: 2023-03-07 06:48:01
Original
2551 people have browsed it

php去除空的数组元素的方法:可以利用array_filter函数来删除数组中的空元素,如【array_filter($array)】。array_filter函数通过用回调函数来过滤数组中的元素。

How to remove empty array elements in php

函数介绍:

array_filter() 函数用回调函数过滤数组中的元素。

该函数把输入数组中的每个键值传给回调函数。如果回调函数返回 true,则把输入数组中的当前键值返回给结果数组。数组键名保持不变。

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代码实现:

 "abc", 'b' => "bcd",'c' =>"cde",'d' =>"def",'e'=>""); $b= array_filter($array); print_r($b); ?>
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执行结果:

Array ( [a] => abc [b] => bcd [c] => cde [d] => def )
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利用foreach或者while语法结构来删除数组中的空元素

代码实现:

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注意:这样的效率并不高。也曾经试过先将$arr转为对象,然后利用对象的特性来删除。因为foreach是将当前操作的数组进行copy,每操作一下foreach,都是copy了一个变量,页面里面如果有太多的foreach,会是一个很大的消耗。

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