search array and get array key

Question

I have an array, which I'd like to search for a value in and retreive the array key if it exists, but not sure how to even go about doing that. Here's my array:

Array
(
    [hours] => Array
        (
            [0] => 5
            [1] => 5
            [2] => 6
            [3] => 6
            [4] => 8
            [5] => 10
        )
)

So I'd like to search the hours array for 10, if 10 exists in the array, I want the key (5) to be returned. If that makes sense?

Am trying to do it dynamically so the search string (10) will change, but I figure if I can get it working for number 10, I can get it working with a variable number :)

Anthony Forloney · Accepted Answer · 2010-04-07 12:48:14Z

6

array_search is what you need.

$var = 10;
$key = array_search($var, $hours);

edited Apr 7, 2010 at 12:48

answered Mar 23, 2010 at 2:20

Anthony Forloney

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1 Comment

Camsoft Over a year ago

Not sure the second example is any more useful than just calling array_search directly?

Tyler Carter · Accepted Answer · 2010-03-23 02:20:16Z

2

 $key = array_search($array, 10);

answered Mar 23, 2010 at 2:20

Tyler Carter

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Comments

codaddict · Accepted Answer · 2010-03-23 02:20:52Z

2

Use the function array_search

$key = array_search(10,$aray); // $key will get 5 in your case.

the syntax is:

key = array_search(value_to_search,array);

answered Mar 23, 2010 at 2:20

codaddict

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LearningFriday.com · Accepted Answer · 2017-01-20 03:16:57Z

0

Syntax : array_search ( Search Keyword here , Array here);  

$array = array(0 => 'blue', 1 => 'red', 2 => 'green', 3 => 'red

$key = array_search('green', $array);   // $key = 2;

$key = array_search('red', $array);  // $key = 1

edited Jan 20, 2017 at 3:16

answered Jan 20, 2017 at 3:05

LearningFriday.com

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1 Comment

Obsidian Age Over a year ago

This question already had an accepted answer more than 6 years ago. Your answer only provides a guide on how to use array_search, rather than adapting it to the question's data. Please only add alternative answers to long-dead questions when they provide a new approach that improves upon the accepted answer.

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