[Resolved] Regex Help needed

Matt_Parsons

I want to be able to check any string for a set of words that i have in an array.
So if i have the words: "it, the,and,for" they will be removed from a string.
I have coded this and its partially working, but i need it to remove exact instances of a word not partial matches, i.e. remove and from a string, but not and out of the word land.

<php>
$mystring='This is my test sentance which will include various words that i want to remove and some that i do not wish to remove for example land';
$wordlist='it,the,and,for,when,we,i,as';
$wordlist_arr=explode(',',$wordlist);
$size=count($wordlist_arr);
foreach ($wordlist_arr as $value)
{
$mystring=ereg_replace("$value([^{a-zA-Z0-9])","} ",$mystring);
}
print $mystring;
</php>

lilleman

Try this:

<?php

#- Get the words from the list
$wordlist = 'it,the,and,for,when,we,i,as';
$wordarray = split(',', $wordlist);

#- Get the words in the string
$words = split(' ', $string);

#- Replace all the words in the wordlist
foreach( $words as $i => $word )
{
  if( in_array( $word , $wordarray ) )
  {
    unset( $words[$i] );
  }
}

#- Put the string together again
$string = implode(' ', $words );

?>

bubblenut

Or could do it like this

<?php
$string="Here is a string with lots of words in which must have some of them stripped out";
$wordlist='it,the,and,for,when,we,i,as';
$wordlist_arr=explode(',',$wordlist);
$replace_arr[count($wordlist)];
$string=str_replace($wordlist_arr,$replace_arr,$string);
?>

HTH
Bubble

Matt_Parsons

thanks lilleman your did the job nicely.
Never thought of doing it that way.

Bubblenut, yours gave the same problems my code did. It did not match the words exactly, so if i had the word "land", i would end up with "l" as "and" was removed when it should not have been.
thanks anyway though.