PHP - 多维数组中删除元素 [英] PHP - remove element in multidimensional array
问题描述
我有这样的数组：
阵列（
[0] =＆GT;阵列（[0] =＆GT; B [1] = D 1和D [2] =＆GT; ** C ** [3] =＆gt;一种[4] =＆GT）[1] =＆GT;阵列（[0] =＆GT; ** C ** [1] =＆gt;一种[2] = D 1和D [3] =＆GT; [4] =＆GT）[2] =＆GT;阵列（[0] =＆GT; B [1] = D 1和D [2] =＆gt;一种[3] =＆GT; [4] =＆GT）[3] =＆GT;阵列（[0] =＆GT; ** C ** [1] = D 1和D [2] =＆gt;一种[3] =＆GT; B [4] =＆GT））
和需要删除的所有元素，其中值为C，使得一种结束（未设置）：
阵列（
[0] =＆GT;阵列（** [0] =＆GT; B [1] = D 1和D [2] =＆gt;一种[3] =＆GT; [4] =＆GT; **）[1] =＆GT;阵列（** [0] =＆gt;一种[1] = D 1和D [2] =＆GT; [3] =＆GT; **）[2] =＆GT;阵列（[0] =＆GT; B [1] = D 1和D [2] =＆gt;一种[3] =＆GT; [4] =＆GT）[3] =＆GT;阵列（** [0] = D 1和D [1] =＆gt;一种[2] =＆GT; B [3] =＆GT; **））
的元素被除去，并且将其他元素升档。我知道，未设置不重新索引的数组。不能得到未设置为所有多维数组，但只有一个阵列。可以在阵列上进行事后重新索引？鸭preciate它。
在code节中删除的元素，其中的值等于C，但第一个元素的索引是不重新索引。任何人都可以提出一个解决方案，以重新索引内的阵列？
$ I = 0;
的foreach（$数组作为$ VAL）
{
的foreach（$ VAL为$关键=＆GT; $ final_val）
{ 如果（$ final_val ==$ search_value）
{
未设置（$数组[$ i] [$关键]）;
}
}
I = $ I + 1;
}
以下code会做你想要什么：
＆LT; PHP
$ A = 1;
$ B = 2;
$ C = 3;
$ D = 4;$ ARR =阵列（
阵列（$ B，$ D，$ C $ A，$ B）
阵列（$ C $ A），
阵列（$ B，$ D，$ C）
阵列（$ C，$ D，$ A，$ B，$ B）
）;
回声前：\\ n;
的print_r（$ ARR）;的foreach（$改编为$ K1 =＆GT; $ Q）{
的foreach（$ Q $为K2 =＆GT; $ R）{
如果（$ R == $ C）{
未设置（$改编[$ K1] [$ K2]）;
}
}
}
回声后：\\ n;
的print_r（$ ARR）;
？＆GT;
输出：
前：
排列
（
[0] =＆GT;排列
（
[0] =＆GT; 2
[1] =＆GT; 4
[2] =＆GT; 3
[3] =＆GT; 1
[4] =＆GT; 2
） [1] =＆GT;排列
（
[0] =＆GT; 3
[1] =＆GT; 1
） [2] =＆GT;排列
（
[0] =＆GT; 2
[1] =＆GT; 4
[2] =＆GT; 3
） [3] =＆GT;排列
（
[0] =＆GT; 3
[1] =＆GT; 4
[2] =＆GT; 1
[3] =＆GT; 2
[4] =＆GT; 2
））
后：
排列
（
[0] =＆GT;排列
（
[0] =＆GT; 2
[1] =＆GT; 4
[3] =＆GT; 1
[4] =＆GT; 2
） [1] =＆GT;排列
（
[1] =＆GT; 1
） [2] =＆GT;排列
（
[0] =＆GT; 2
[1] =＆GT; 4
） [3] =＆GT;排列
（
[1] =＆GT; 4
[2] =＆GT; 1
[3] =＆GT; 2
[4] =＆GT; 2
））
正如你所看到的，所有的都走了 3 ...
I have this array:
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] => )
)
and need to delete (unset?) all elements where value is "c" so that one ends up with:
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] =>** )
)
The element gets removed, and the other elements to shift up. I know that unset does not re-index the array. Cannot get to unset for all multidimensional arrays, but only with one array. Can the arrays be re-indexed afterwards? Appreciate it.
The code BELOW removes elements where the value is equal to "c" but the index of the first element is not re-indexed. Can anyone suggest a solution to re-indexing the inner arrays?
$i=0;
foreach ($array as $val)
{
foreach ($val as $key => $final_val)
{
if ($final_val =="$search_value")
{
unset($array[$i][$key]);
}
}
i = $i + 1;
}
The following code will do what you want:
<?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);
?>
Output:
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
)
)
As you can see, all the 3's have gone...
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