Extract key from array based on string search

Question

I have a multi-dimensional array (see below) and I want to extract the key of a certain value.

For instance:

Give me the key of "Value 2". This should return 1.
Give me the key of "Column 3". This should return 2.

Array ( [0] => Array ( [0] => Column 1 [1] => Column 2 [2] => Column 3 ) 
        [1] => Array ( [0] => Value 1 [1] => Value 2 [2] => Value 3 )

Is there a simple function to make this work?

Use php.net/manual/en/function.array-search.php, but you either loop the array or use $array[0] etc... — AbraCadaver
– AbraCadaver, Commented May 26, 2017 at 19:50

Barmar · Accepted Answer · 2017-05-26 20:13:42Z

1

function findKey($array,$prop){
    foreach($array as $key => $val){
        foreach($array[$key] as $index => $value)
            if( $value === $prop ){
                return $index;
            }
    }   
}

findKey($array,'Value 2');

edited May 26, 2017 at 20:13

Barmar

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answered May 26, 2017 at 19:56

admcfajn

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