在php数组中搜索值并获取所有键 [英] Search value in php array and get all keys

问题描述

有没有比使用if的foreach循环更好(=更快)的解决方案来获取数组中所有值的键?

Is there any better (= quicker ) solution to get all keys of value in array than foreach loop with if?

$array = array('apple', 'orange', 'pear', 'banana', 'apple',
'pear', 'kiwi', 'kiwi', 'kiwi');

print_r($ array);会给我的:

print_r($array); will give me:

Array ( [0] => apple [1] => orange [2] => pear [3] => banana [4] => apple [5] => pear [6] => kiwi [7] => kiwi [8] => kiwi )

array_search("kiwi"，$ array);会给我 6

array_search("kiwi", $array); will give me 6

但是我想要猕猴桃的所有键.所以我要 6,7,8 .在这种情况下.

But I want all keys of kiwi. So I want 6,7,8. In this case.

Bruteforce搜索循环:

Bruteforce search loop:

 $searchObject = "kiwi";
 $keys = array();
 foreach($array as $k => $v) {
 if($v == $searchObject) $keys[] = $k; 
}

推荐答案

或者，您也可以使用 array_keys ，并提供第二个参数指针:

Alternatively, you could also use array_keys in this case, and providing the second parameter needle:

$array = array('apple', 'orange', 'pear', 'banana', 'apple', 'pear', 'kiwi', 'kiwi', 'kiwi');
$searchObject = 'kiwi';
$keys = array_keys($array, $searchObject);
print_r($keys);

示例输出

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