str_replace when matched and followed by space or special characters - php

Question

I have a working function that strips profanity words.
The word list is compose of 1700 bad words.
My problem is that it censored
'badwords '
but not
'badwords.' , 'badwords' and the like.
If I chose to remove space after
$badword[$key] = $word;
instead of
$badword[$key] = $word." ";
then I would have a bigger problem because if the bad word is CON then it will stripped a word CONSTANT
My question is, how can i strip a WORD followed by special characters except space?
badword. badword# badword,
.
function badWordFilter($data)
{
$wordlist = file_get_contents("badwordsnew.txt");
$words = explode(",", $wordlist);
$badword = array();
$replacementword = array();
foreach ($words as $key => $word)
{
$badword[$key] = $word." ";
$replacementword[$key] = addStars($word);
}
return str_ireplace($badword,$replacementword,$data);
}
function addStars($word)
{
$length = strlen($word);
return "*" . substr($word, 1, 1) . str_repeat("*", $length - 2)." " ;
}

Answer 1

Assuming that $data is a text that needs to be censored, badWordFilter() will return the text with bad words as *.
function badWordFilter($data)
{
$wordlist = file_get_contents("badwordsnew.txt");
$words = explode(",", $wordlist);
$specialCharacters = ["!","#","#","$","%","^","&","*","(",")","_","+",".",",",""];
$dataList = explode(" ", $data);
$output = "";
foreach ($dataList as $check)
{
$temp = $check;
$doesContain = contains($check, $words);
if($doesContain != false){
foreach($specialCharacters as $character){
if($check == $doesContain . $character || $check == $character . $doesContain ){
$temp = addStars($doesContain);
}
}
}
$output .= $temp . " ";
}
return $output;
}
function contains($str, array $arr)
{
foreach($arr as $a) {
if (stripos($str,$a) !== false) return $a;
}
return false;
}
function addStars($word)
{
$length = strlen($word);
return "*" . substr($word, 1, 1) . str_repeat("*", $length - 2)." " ;
}
Sandbox

Answer 2

I was able to answer my own question with the help of #maxchehab answer, but I can't declared his answer because it has fault at some area. I am posting this answer so others can use this code when they need a BAD WORD FILTER.
function badWordFinder($data)
{
$data = " " . $data . " "; //adding white space at the beginning and end of $data will help stripped bad words located at the begging and/or end.
$badwordlist = "bad,words,here,comma separated,no space before and after the word(s),multiple word is allowed"; //file_get_contents("badwordsnew.txt"); //
$badwords = explode(",", $badwordlist);
$capturedBadwords = array();
foreach ($badwords as $bad)
{
if(stripos($data, $bad))
{
array_push($capturedBadwords, $bad);
}
}
return badWordFilter($data, $capturedBadwords);
}
function badWordFilter($data, array $capturedBadwords)
{
$specialCharacters = ["!","#","#","$","%","^","&","*","(",")","_","+",".",","," "];
foreach ($specialCharacters as $endingAt)
{
foreach ($capturedBadwords as $bad)
{
$data = str_ireplace($bad.$endingAt, addStars($bad), $data);
}
}
return trim($data);
}
function addStars($bad)
{
$length = strlen($bad);
return "*" . substr($bad, 1, 1) . str_repeat("*", $length - 2)." ";
}
$str = 'i am bad words but i cant post it here because it is not allowed by the website some bad words# here with bad. ending in specia character but my code is badly strong so i can captured and striped those bad words.';
echo "$str<br><br>";
echo badWordFinder($str);