Search value in php array and get all keys

Question

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); 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); will give me 6

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

Bruteforce search loop:

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

Kevin · Accepted Answer · 2022-02-16 01:16:44Z

47

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

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

Would yield something like this:

Array
(
    [0] => 6
    [1] => 7
    [2] => 8
)

Sample Output

edited Feb 16, 2022 at 1:16

answered Jan 26, 2015 at 3:45

Kevin

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Comments

Syed Uzair Jawed · Accepted Answer · 2015-01-26 03:46:23Z

2

function array_search_values( $m_needle, $a_haystack, $b_strict = false){
    return array_intersect_key( $a_haystack, array_flip( array_keys( $a_haystack, $m_needle, $b_strict)));
}

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

print_r( array_search_values( 'kiwi', $array,true));

answered Jan 26, 2015 at 3:46

Syed Uzair Jawed

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Comments

nani · Accepted Answer · 2015-01-26 03:43:58Z

0

Try this :)

<?php
    $array = array('apple', 'orange', 'pear', 'banana', 'apple','pear', 'kiwi', 'kiwi', 'kiwi');
    $count = count($array);
    $str_to_search = 'kiwi';
    for($i=0;$i<$count;$i++){
        if($array[$i] == $str_to_search){
            echo $i.",";
        }
    }
?>

answered Jan 26, 2015 at 3:43

nani

787 bronze badges

1 Comment

Randyka Yudhistira Over a year ago

is that quicker solution? i dont think so

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