PHP - Reverse associative array

Question

I want to get the value of the index that it's associated with.

Let's say I have an 'fname' => 'Bear' Then I receive a recieve an input from the user with a value of 'Bear' I want to Identify the data through the use of association, is it possible to build an array that looks like this 'fname' <=> 'Bear ? If yes, can you give me some example on how to use it?

this is my PHP code

$array = array('lname'=>'Teddy', 'fname' => 'Bear'); 

 $user_input = 'Teddy';
 echo $array[$user_input]; // I want this to give me the value of lname
                           // because lname is associated with Teddy

Or array_keys: echo array_keys($array, $user_input)[0]; See demo — Jonny 5
– Jonny 5, Commented Sep 2, 2015 at 13:41

phpisuber01 · Accepted Answer · 2015-09-02 13:35:41Z

3

One possible solution is to use array_flip

$array = array('lname'=>'Teddy', 'fname' => 'Bear');

$user_input = "Teddy";

$flipped = array_flip($array);

echo $flipped[$user_input]; // lname

answered Sep 2, 2015 at 13:35

phpisuber01

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1 Comment

KennethC Over a year ago

Cool. Never heard of it. Thanks bro.

Narendrasingh Sisodia · Accepted Answer · 2015-09-02 13:44:11Z

3

Simplest one is using array_search as

echo array_search('Teddy',$array); // lname

answered Sep 2, 2015 at 13:44

Narendrasingh Sisodia

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2 Comments

phpisuber01 Over a year ago

This is much more efficient as it does not require you to copy the array like in my answer.

Narendrasingh Sisodia Over a year ago

Yes it is but none less yours one is an alternative to the answer. @phpisuber01

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