從PHP數(shù)組中刪除元素是否有一種使用PHP從數(shù)組中刪除元素的簡(jiǎn)單方法，例如foreach ($array)不再包括那個(gè)元素了？我以為把它設(shè)置為null可以做到，但顯然不起作用。
4 回答
心有法竹
TA貢獻(xiàn)1866條經(jīng)驗(yàn) 獲得超5個(gè)贊
刪除一個(gè)數(shù)組元素
\unset()\array_splice().
\array_search()
\unset()方法
\unset()\array_values()\unset()
<?php $array = [0 => "a", 1 => "b", 2 => "c"]; \unset($array[1]); //↑ Key which you want to delete?>
[ [0] => a [2] => c]
\array_splice()方法
\array_splice()\array_values()
\array_splice()
<?php $array = [0 => "a", 1 => "b", 2 => "c"]; \array_splice($array, 1, 1); //↑ Offset which you want to delete?>
[ [0] => a [1] => c]
array_splice()\unset()
刪除多個(gè)數(shù)組元素
\unset()\array_splice()\array_diff()\array_diff_key()
\array_diff()方法
\array_diff()\unset()
<?php $array = [0 => "a", 1 => "b", 2 => "c"]; $array = \array_diff($array, ["a", "c"]); //└────────┘→ Array values which you want to delete?>
[ [1] => b]
\array_diff_key()方法
\array_diff_key()\array_flip()
<?php $array = [0 => "a", 1 => "b", 2 => "c"]; $array = \array_diff_key($array, [0 => "xy", "2" => "xy"]); //↑ ↑ Array keys which you want to delete?>
[ [1] => b]
\unset()\array_splice()\array_keys()
白衣染霜花
TA貢獻(xiàn)1796條經(jīng)驗(yàn) 獲得超10個(gè)贊
unset()
$array = array(0, 1, 2, 3);unset($array[2]);var_dump($array);/* array(3) {
[0]=>
int(0)
[1]=>
int(1)
[3]=>
int(3)
} */$array = array(0, 1, 2, 3);array_splice($array, 2, 1);var_dump($array);/* array(3) {
[0]=>
int(0)
[1]=>
int(1)
[2]=>
int(3)
} */array_splice()array_values()unset():
$array = array(0, 1, 2, 3);unset($array[2]);$array = array_values($array);var_dump($array);/* array(3) {
[0]=>
int(0)
[1]=>
int(1)
[2]=>
int(3)
} */
HUH函數(shù)
TA貢獻(xiàn)1836條經(jīng)驗(yàn) 獲得超4個(gè)贊
// Our initial array
$arr = array("blue", "green", "red", "yellow", "green", "orange", "yellow", "indigo", "red");
print_r($arr);
// Remove the elements who's values are yellow or red
$arr = array_diff($arr, array("yellow", "red"));
print_r($arr);Array( [0] => blue [1] => green [2] => red [3] => yellow [4] => green [5] => orange [6] => yellow [7] => indigo [8] => red)Array( [0] => blue [1] => green [4] => green [5] => orange [7] => indigo)
$arr = array_merge(array_diff($arr, array("yellow", "red")));print_r($arr);Array( [0] => blue [1] => green [2] => green [3] => orange [4] => indigo)
偶然的你
TA貢獻(xiàn)1841條經(jīng)驗(yàn) 獲得超3個(gè)贊
$key = array_search($needle, $array);if ($key !== false) {
unset($array[$key]);}- 4 回答
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