PHP case-insensitive in_array function

Question

Is it possible to do case-insensitive comparison when using the in_array function?

So with a source array like this:

$a= array(
 \'one\'         


        

Answer 1

I wrote a simple function to check for a insensitive value in an array the code is below.

function:

function in_array_insensitive($needle, $haystack) {
   $needle = strtolower($needle);
   foreach($haystack as $k => $v) {
      $haystack[$k] = strtolower($v);
   }
   return in_array($needle, $haystack);
}

how to use:

$array = array('one', 'two', 'three', 'four');
var_dump(in_array_insensitive('fOUr', $array));