[SOLVED] checking to see if a string contains a specific word?

[law]

I need to search a string for a set of key words. I need to match up these key words regardless of whitespace and capitalization. Can anyone tell me how I can accomplish this in a similar construct to my function example below?

 

Here is my really ugly example:

function does_contain ($string, $input){
$var = strrpos($string, $input);
if ($var === false) {
	$var= "no";
} else {
	$var = "yes";
}
return $var;
}
$in = does_contain("IN"," IN ");
echo $in;

[thebadbad]

You can use stripos() instead of strrpos() for case-insensitivity. And you can trim() the input (needle) to remove any leading or trailing whitespace:

 

<?php
function does_contain($haystack, $needle) {
   if (stripos($haystack, trim($needle)) === false) {
      return 'no';
   } else {
      return 'yes';
   }
}
echo does_contain("IN"," IN ");
?>

 

Is that what you want?

[Ken2k7]

I would just do this:

 

function does_contain ($haystack, $needle) {
     return stripos($haystack, trim($needle));
}

In fact, I wouldn't do that. It's redundant.

 

But if you really want those strings -

function does_contain ($haystack, $needle) {
     return stripos($haystack, trim($needle)) === false? 'no' : 'yes';
}