Search code examples
phpregexpreg-replacepreg-match

php regex operation for url and # value detection

I want to make all the URL occurrence in text string as link. When I tried

preg_match($reg_exUrl, $text, $url) echo preg_replace($reg_exUrl1, '<a href="'.$url[0].'" rel="nofollow">'.$url[0].'</a>', $text);

it has replaced first match URL at all the places.

Also following regex expression was not able to detect URL which ar starting with www.

$reg_exUrl1 = "/(http|https|ftp|ftps)\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?/";

$text = "The text you want to filter goes here. http://www.google.com data which in the http://www.apple.com";

if( preg_match($reg_exUrl, $text, $url)){
 echo preg_replace($reg_exUrl1, '<a href="'.$url[0].'" rel="nofollow">'.$url[0].'</a>', $text);
   // if no URLs in the text just return the text

}else {
    echo "IN Else #$".$text;
 }

This is the code for # value detection in string.

$text= "This is a detection of a #tag values in the text. any #special values with #hash will be shown as link";

$reg_exUrl ="/#\w+/";
if( preg_match($reg_exUrl1, $text, $url)){
    echo preg_replace($reg_exUrl1, '<a href="'.$url[0].'"     rel="nofollow">'.$url[0].'</a>', $text);
}else {
  echo "not Matched".$text;

}

Solution

  • Check this 

    $reg_exUrl1 = "~(http|https|ftp|ftps)://[a-zA-Z0-9-.]+\.[a-zA-Z]{2,3}(/S*)?~";

$text = "The text you want to filter goes here. http://www.google.com data which in the http://www.apple.com";

if( preg_match($reg_exUrl1, $text, $url)){
 echo preg_replace($reg_exUrl1, '<a href="$0" rel="nofollow">$0</a>', $text);
   // if no URLs in the text just return the text

}else {
    echo "IN Else #$".$text;
 }

    UPDATE

    $reg_exUrl ="/#\w+/";
if( preg_match($reg_exUrl, $text, $url)){
   echo preg_replace($reg_exUrl, '<a href="$0" rel="nofollow">$0</a>', $text);
}else {
  echo "not Matched".$text;