PHP - How To Remove First 3 Words On A String

hi folks, i have a variable in which some common words are stored and another variable in which a sentence is stored. I want to remove the common words from the sentence> Is there any way of doing this in PHP?
Code: [Select]
<?php
$common_words = "to, this, all, the, from";
$sentence = "I want to remove all the common words from this sentence";
?>the final output should be:
"I remove common words sentence."

This topic has been moved to PHP Regex.

http://www.phpfreaks.com/forums/index.php?topic=326004.0

Dear all,
I want to remove all lines less than 3 words longs so I can stuff the rest into a db.
Can somebody help me?
Thank you in advance

Hi, i got help earlier with the this code-- exploding a field and getting an array, then inserting the array into a multiselect box-- That part is easy and works fine.

Now the explode function gives an array of words with duplicate words in it:
I tried several ways most either give a blank option/value, or the array word..

here is the code:


$query = "SELECT DISTINCT property_functionsexperience FROM #__users_profiles WHERE published = '1' ORDER BY property_functionsexperience ASC";
      $functionsexperiencelistgeneral=doSelectSql($query);      
        foreach($functionsexperiencelistgeneral as $words)
      $property_funcexperilist=$words->property_functionsexperience;      
        $wording = explode(', ', $property_funcexperilist);
        foreach($wording as $funciex)
      $funcexi=array_unique($funciex);
      $funcexpList .= "<option value=\"".$funcexi.','."\">".$funcexi."</option>";
      $funcexpList .= "</optgroup>";
            }
         $funcexpList.="</select>";
         $output['FUNCEXPLIST']=$funcexpList;         


this code is adapted slightly from the working original that gives the double words-- this code gives a blank, but i think its on the correct track!?

I can't seem to find a decent code function to search for "curse" words that i would deem inappropriate in an array. Count the number of instances the function finds a curse word and then if the number is greater than one halt the script.

something like the following but not really....
Code: [Select]
$words = array('ass','fuck','shit');
$string = 'Blah blah blah ass blah blah fuck blah blah shit!';
//code to count the instances of the curse words(3)
if($instances > 0)
{
echo "no cursing please.";
} ;
any help on how to do this would be much appreciated!