Multiple Value Match In Array Php Code Example

I need to get the keys from values that are duplicates. I tried lớn use array_search & that worked fine, BUT I only got the first value as a hit.

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I need lớn get both keys from the duplicate values, in this case 0 & 2. The search result output đầu ra as an array would be good.

Is there a PHP function to vày this or vị I need lớn write some multiple loops to vì chưng it?

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You want array_keys with the tìm kiếm value

$uniqueKeys = array_unique($list<0>)foreach ($uniqueKeys as $uniqueKey) $v = array_keys($list<0>, $uniqueKey); if (count($v) > 1) foreach ($v as $key) // Work with $list<0><$key>

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In array_search() we can read:

If needle is found in haystack more than once, the first matching key is returned. To lớn return the keys for all matching values, use array_keys() with the optional search_value parameter instead.

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The following combination of function calls will give you all duplicate values:

$a = array(1, 1, 2, 3, 4, 5, 99, 2, 5, 2);$unique = array_unique($a); // preserves keys$diffkeys = array_diff_key($a, $unique);$duplicates = array_unique($diffkeys);echo "Duplicates: " . Join(" ", $duplicates) . " "; // 1 2 5
You can achieve that using array_search() by using while loop & the following workaround:

For one-multidimensional array, you may use the following function to lớn achieve that (as alternative to lớn array_keys()):

function array_isearch($str, $array) $found = array(); foreach ($array as $k => $v) if (strtolower($v) == strtolower($str)) $found<> = $k; return $found;Source: robertark, php.net


The PHP manual states in the Return Value section of the array_search() function documentation that you can use array_keys() khổng lồ accomplish this. You just need to lớn provide the second parameter:

$userdb=Array( (0) => Array ( (uid) => "100", (name) => "Sandra Shush", (url) => "urlof100" ),);$key = array_search(100, array_column($userdb, "uid"));
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