CODEWITHSUNDEEP
phparrays
aryan singh
aryan singh

Reputation: 827

get the index of multi dimension array , with value in php

I want to get the index of an array without foreach. this is sample array 

Array
(
    [0] => Array
        (
            [gcr_distance] => 31.0
            [gcr_id] => 23
        )

    [1] => Array
        (
            [gcr_distance] => 28.0
            [gcr_id] => 22
        )

    [2] => Array
        (
            [gcr_distance] => 26.0
            [gcr_id] => 20
        )

    [3] => Array
        (
            [gcr_distance] => 110.0
            [gcr_id] => 21
        )

)

suppose if my data is gcr_id=21, by comparing with the above array it should give me an index of array 3

Upvotes: 0

Views: 43

Answers (1)

Nick
Nick

Reputation: 147146

You can use a combination of array_search and array_column. array_column returns all the values which have a key of 'gcr_id' and then array_search returns the key which corresponds to a value of 21.

$array = array(
    array('gcr_distance' => 31.0, 'gcr_id' => 23),
    array('gcr_distance' => 28.0, 'gcr_id' => 22),
    array('gcr_distance' => 26.0, 'gcr_id' => 20),
    array('gcr_distance' => 110.0, 'gcr_id' => 21)
);

$key = array_search(21, array_column($array, 'gcr_id'));
echo $key;

Output:

3

Inspired by @Elementary's comment, I did some bench testing on this. What I found was that on a 100k entry array, array_search and array_column took around 80% of the time that a foreach based search took when the entry was not in the array, 95% of which was in the call to array_column. So it would seem that on average, a foreach based search would be faster.

Upvotes: 4

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