PHP 数组修剪空白索引值

发布于 2024-08-24 06:04:46 字数 312 浏览 3 评论 0原文

如何修剪 PHP 数组并删除所有空索引

Array
(
    [0] => 
    [1] =>
    [2] =>
    [3] =>
    [4] =>
    [5] =>
    [6] =>
    [7] => 4
    [8] => 6
    [9] =>

)

输出应该类似于

 Array
    (
        [0] => 4
        [1] => 6   
    )

原文

How to trim a PHP array and remove all empty indexes

Array
(
    [0] => 
    [1] =>
    [2] =>
    [3] =>
    [4] =>
    [5] =>
    [6] =>
    [7] => 4
    [8] => 6
    [9] =>

)

Output should be like

 Array
    (
        [0] => 4
        [1] => 6   
    )

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没有伤那来痛 2024-08-31 06:04:46

您正在寻找 array_filter 函数 ;-)

例如，这部分代码：

$arr = array(null, 0, null, 0, '', null, '', 4, 6, '', );
$arr_filtered = array_filter($arr);
var_dump($arr_filtered);

将为您提供以下输出：

array
  7 => int 4
  8 => int 6

请注意，所有“假”值已被删除。

如果你想更具体，你可以指定你自己的过滤功能。例如，要从数组中仅删除 null，我可以使用这个：

function my_filter($item) {
    if ($item === null) {
        return false;
    }
    return true;
}

$arr = array(null, 0, null, 0, '', null, '', 4, 6, '', );
$arr_filtered = array_filter($arr, 'my_filter');
var_dump($arr_filtered);

我会得到：

array
  1 => int 0
  3 => int 0
  4 => string '' (length=0)
  6 => string '' (length=0)
  7 => int 4
  8 => int 6
  9 => string '' (length=0)

You are looking for the array_filter function ;-)

For instance, this portion of code :

$arr = array(null, 0, null, 0, '', null, '', 4, 6, '', );
$arr_filtered = array_filter($arr);
var_dump($arr_filtered);

Will give you the following output :

array
  7 => int 4
  8 => int 6

Note that all "falsy" values have been removed.

And if you want to be more specific, you can specify your own filtering function. For instance, to remove only nulls from the array, I could use this :

function my_filter($item) {
    if ($item === null) {
        return false;
    }
    return true;
}

$arr = array(null, 0, null, 0, '', null, '', 4, 6, '', );
$arr_filtered = array_filter($arr, 'my_filter');
var_dump($arr_filtered);

And I'd get :

array
  1 => int 0
  3 => int 0
  4 => string '' (length=0)
  6 => string '' (length=0)
  7 => int 4
  8 => int 6
  9 => string '' (length=0)

回复收藏 0 原文

濫情▎り 2024-08-31 06:04:46

另一种方式：

<?php

$array = array(
    0 => 0,
    1 => ,
    2 => '',
    3 => 4,
    4 => 6,
    5 => null
);

foreach( $array as $a )
{
    if( !empty($a) AND $a != NULL AND $a != 0 ) // NULL, 0
    {
        $new_array[] = $a;
    }
}

print_r( $new_array );

?>

输出将是：

Array
(
    [0] => 4
    [1] => 6
)

Here another way:

<?php

$array = array(
    0 => 0,
    1 => ,
    2 => '',
    3 => 4,
    4 => 6,
    5 => null
);

foreach( $array as $a )
{
    if( !empty($a) AND $a != NULL AND $a != 0 ) // NULL, 0
    {
        $new_array[] = $a;
    }
}

print_r( $new_array );

?>

Output will be: