Search array and return multiple matches

Question

For example if I am searching for a key with a value 5 in my array $cake, I could use the following code:

$cake = array("a"=>6,"b"=>5,"c"=>6);
echo array_search(5, $cake, true); // returns "b";

But if my $cake array contains multiple matches, only the first match is returned:

$cake = array("a"=>6,"b"=>5,"c"=>5,"d"=>5,"e"=>5);
echo array_search(5, $cake, true); // returns "b";

How can I return multiple matches as an array? Like this:

$cake = array("a"=>6,"b"=>5,"c"=>5,"d"=>5,"e"=>5);
// return array("b","c","d","e");

maybe this http://stackoverflow.com/questions/1212605/php-array-search-for-multiple-values — Millard, Jul 29 '13 at 15:39

score 12 · Accepted Answer · answered Jul 29 '13 at 15:39

12

As noted in the docs:

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

print_r(array_keys($cake, 5, true));

answered Jul 29 '13 at 15:39

Jason McCreary

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score 0 · Answer 2 · edited Jul 29 '13 at 15:50

0

you can do this:

for($index = 0; $index <= count($cake); $index++){
    if(!array_search(5, $cake[$index], true) == false){
        echo array_search(5, $cake[$index], true);
    }
}

edited Jul 29 '13 at 15:50

HamZa

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answered Jul 29 '13 at 15:42

guy

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Orangepill · Answer 3 · 2013-07-29T15:50:21.533

0

You can use array_intersect.

array_intersect — Computes the intersection of arrays

 $matches = array_keys(array_intersect($cake, array(5)));
 print_r($matches);

Outputs

Array
(
    [0] => b
    [1] => c
    [2] => d
    [3] => e
)

edited Jul 29 '13 at 15:50

answered Jul 29 '13 at 15:43

Orangepill

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Search array and return multiple matches

3 Answers3