2nd problem

<?php

$text = $_GET['text'];
//var_dump($text);
//$text = "Hi, I'm an air-conditioner technician, so if you need any assistance you can contact me at air-conditioners@gmail.com . Secondary email: kinky_technician@yahoo.in or at naked-screwdriver@abv.bg OR pesho@dir.tk";
$blacklist  = $_GET['blacklist'];
//$blacklist = '*.bg
//pesho@dir.tk
//*.com
//';
$pattern = '/[0-9A-Za-z\_\+\-]+@[0-9A-Za-z\-]+\.[0-9A-Za-z\-\.]+/';

preg_match_all($pattern, $text, $result);
$blacklist = preg_split('/[\n\r]+/', $blacklist);

for ($i = 0; $i < count($blacklist); $i++) {
  $blacklist[$i]= str_replace('*', '',$blacklist[$i]);
}
array_pop($blacklist);
$arr = array_shift($result);
$patterns= array();
for ($i = 0; $i < count($arr); $i++) {
  $patterns[]= "/$arr[$i]/";
}

for ($i = 0; $i < count($arr); $i++) {
  for ($j = 0; $j < count($blacklist); $j++) {
    if(strpos($arr[$i], $blacklist[$j]) !=0 || strpos($arr[$i], $blacklist[$j])===0){
        $arr[$i]= str_repeat('*', strlen($arr[$i]));
    }
  }
}
//var_dump($arr);
for ($i = 0; $i < count($arr); $i++) {
  if(!(strpos($arr[$i], '*')===0)){
    $arr[$i]= "<a href=\"mailto:$arr[$i]\">$arr[$i]</a>";
  }
}
//var_dump($arr);
for ($i = 0; $i < count($arr); $i++) {
 $text= preg_replace($patterns[$i], $arr[$i], $text);
}
$text = "<p>".$text."</p>";
echo $text;
//var_dump($text);

?>