how to match value in PHP array and then find key value?

Question

I have an array variable $colorArray = array('red','white','blue');

Suppose $color = "red";, how do I match the value of $color with $colorArray and then find the corresponding key value of "red"? After I find the key value of "red", I would then need to store the key value in another variable for other uses.

array_search() nz.php.net/manual/en/function.array-search.php — user557846
– user557846, Commented Jun 27, 2011 at 3:53

alex · Accepted Answer · 2011-06-27 03:53:36Z

14

Use array_search().

$key = array_search($color, $colorArray);

To ensure you got a match, make sure you compare it to FALSE and not just falsy.

if ($key !== FALSE) {
   // Match made.
}

answered Jun 27, 2011 at 3:53

alex

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deceze · Accepted Answer · 2011-06-27 03:53:27Z

1

You're looking for array_search: http://www.php.net/array_search

answered Jun 27, 2011 at 3:53

deceze♦

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AC2MO · Accepted Answer · 2011-06-27 03:54:02Z

1

Use array_search, here's an example:

$key = array_search($color, $colorArray);

In your example, this would return 0.

answered Jun 27, 2011 at 3:54

AC2MO

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