我有这个数组:
Array (
[0] => Array ( [0] => b [1] => d [2] => **c** [3] =>a [4] => )
[1] => Array ( [0] => **c** [1] => a [2] => d [3] => [4] => )
[2] => Array ( [0] => b [1] => d [2] => a [3] => [4] => )
[3] => Array ( [0] => **c** [1] => d [2] => a [3] =>b [4] => )
)
并且需要删除(取消设置？)值为“c”的所有元素，以便最终得到:
Array (
[0] => Array ( **[0] => b [1] => d [2] => a [3] => [4] =>** )
[1] => Array ( **[0] => a [1] => d [2] => [3] =>** )
[2] => Array ( [0] => b [1] => d [2] => a [3] => [4] => )
[3] => Array ( **[0] => d [1] => a [2] =>b [3] =>** )
)
元素被移除，其他元素向上移动。我知道 unset 不会重新索引数组。无法取消所有多维数组的设置，但只能取消设置一个数组。之后可以重新索引数组吗？欣赏它。
下面的代码删除了值等于“c”但第一个元素的索引没有重新索引的元素。任何人都可以建议重新索引内部数组的解决方案吗？
$i=0;
foreach ($array as $val)
{
foreach ($val as $key => $final_val)
{
if ($final_val =="$search_value")
{
unset($array[$i][$key]);
}
}
i = $i + 1;
}
最佳答案
以下代码将执行您想要的操作:
<?php
$a = 1;
$b = 2;
$c = 3;
$d = 4;
$arr = array(
array ( $b, $d, $c, $a, $b),
array ($c, $a),
array ( $b, $d, $c ),
array( $c, $d, $a, $b, $b)
);
echo "before:\n";
print_r($arr);
foreach($arr as $k1=>$q) {
foreach($q as $k2=>$r) {
if($r == $c) {
unset($arr[$k1][$k2]);
}
}
}
echo "after:\n";
print_r($arr);
?>
输出:
before:
Array
(
[0] => Array
(
[0] => 2
[1] => 4
[2] => 3
[3] => 1
[4] => 2
)
[1] => Array
(
[0] => 3
[1] => 1
)
[2] => Array
(
[0] => 2
[1] => 4
[2] => 3
)
[3] => Array
(
[0] => 3
[1] => 4
[2] => 1
[3] => 2
[4] => 2
)
)
after:
Array
(
[0] => Array
(
[0] => 2
[1] => 4
[3] => 1
[4] => 2
)
[1] => Array
(
[1] => 1
)
[2] => Array
(
[0] => 2
[1] => 4
)
[3] => Array
(
[1] => 4
[2] => 1
[3] => 2
[4] => 2
)
)
如您所见，所有
3已经走了...
关于arrays - PHP - 删除多维数组中的元素，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/21249041/