I need help converting PHP eregi_replace to preg [duplicate]

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This question already has answers here:

How can I convert ereg expressions to preg in PHP? (4 answers)

Closed 1 year ago.

I know its a bit long. I'm trying to catch up on a deadline and if anyone could help me, I would gladly appreciate it. Another friend programmer of mine made this PHP script but unfortunately its already deprecated and doesn't work. Can anyone convert this to preg? I know nothing about eregi, preg, rejex, etc.

    function tolink($text){

    $text = " ".$text;

    $text = eregi_replace('(((f|ht){1}tp://)[-a-zA-Z0-9@:%_\+.~#?&//=]+)',

    '<a href="\\1" target="_blank" rel="nofollow">\\1</a>', $text);

    $text = eregi_replace('(((f|ht){1}tps://)[-a-zA-Z0-9@:%_\+.~#?&//=]+)',

    '<a href="\\1" target="_blank" rel="nofollow">\\1</a>', $text);

    $text = eregi_replace('([[:space:]()[{}])(www.[-a-zA-Z0-9@:%_\+.~#?&//=]+)',

    '\\1<a href="http://\\2" target="_blank" rel="nofollow">\\2</a>', $text);

    $text = eregi_replace('([_\.0-9a-z-]+@([0-9a-z][0-9a-z-]+\.)+[a-z]{2,4})',

    '<a href="mailto:\\1"  rel="nofollow">\\1</a>', $text);

    return $text;

    }

Answer 1

wouldn't it be like this

  function tolink($text){
 $text = " ".$text;
 $text = preg_replace("/(((f|ht){1}tp:\/\/)[-a-zA-Z0-9@:%_\+.~#?&\/\/=]+)/","<a href=\"$1\" target=\"_blank\" rel=\"nofollow\">$1</a>", $text);
$text = preg_replace("/(((f|ht){1}tps:\/\/)[-a-zA-Z0-9@:%_\+.~#?&\/\/=]+)/","<a href=\"$1\" target=\"_blank\" rel=\"nofollow\">$1</a>", $text);
 $text = preg_replace("/([[:space:]()[{}])(www.[-a-zA-Z0-9@:%_\+.~#?&\/\/=]+)/",
                      "$1<a href=\"http://$2\" target=\"_blank\" rel=\"nofollow\">$2</a>", $text);

 $text = preg_replace('/([_\.0-9a-z-]+@([0-9a-z][0-9a-z-]+\.)+[a-z]{2,4})/',
                      "<a href=\"mailto:$1\"  rel=\"nofollow\">$1</a>", $text);
 return $text;

}

you can also append i at the end of preg_replace pattern to make so that lowercase and uppercase character will be matched

this is what i mean

 preg_replace('/(((f|ht){1}tp:\/\/)[-a-zA-Z0-9@:%_\+.~#?&\/\/=]+)/i' .....