reg.exp og explode i if løkke.

Hej E.

har følgende kode:

else if(list($tag, $link) = explode(":", $val[1])) { 
  $val[1] = str_replace($val[1], $link, $val[1]);
  $val[1] = str_replace("]", "", $val[1]);
  $val[1] = "<a href=\"".$val[1]."\">";
  $val[4] = str_replace($val[4], "</a>", $val[4]);
  $finished_string = $val[1].$val[3].$val[4];
}

den tjekker noget tekst for bla. [url:minside.php]mit linknavn[/url]

problemet er nu at den laver alt under det til links.

Hele scriptet ser sådan her ud:

<?php

// The \\2 is an example of backreferencing. This tells pcre that
// it must match the second set of parentheses in the regular expression
// itself, which would be the ([\w]+) in this case. The extra backslash is
// required because the string is in double quotes.

$html = "<b>bold text</b><a href=howdy.html>click me</a>";
$html2 = "bold text[url:howdy.html]click me[/url]

header1

Header2

Header3

";

preg_match_all("/(\[([\w]+)[^\]]*\])(.*)(\[\/\\2\])/", $html2, $matches, PREG_SET_ORDER);

//preg_match_all("/(<([\w]+)[^>]*>)(.*)(<\/\\2>)/", $html, $matches, PREG_SET_ORDER);

foreach ($matches as $val) {

if($val[1] == "" AND $val[4] == "") {
  $val[1] = str_replace("","<b>", $val[1]);
  $val[4] = str_replace("","</b>", $val[4]); 
 
  $finished_string = $val[1].$val[3].$val[4];
}
else if(list($tag, $link) = explode(":", $val[1])) { 
  $val[1] = str_replace($val[1], $link, $val[1]);
  $val[1] = str_replace("]", "", $val[1]);
  $val[1] = "<a href=\"".$val[1]."\">";
  $val[4] = str_replace($val[4], "</a>", $val[4]);
  $finished_string = $val[1].$val[3].$val[4];
}
else if($val[1] == "

" AND $val[4] == "

") {
  $val[1] = str_replace("

","<h1>", $val[1]);
  $val[4] = str_replace("

","</h1>", $val[4]); 
 
  $finished_string = $val[1].$val[3].$val[4]; 
}
else {
  $finished_string = "no formation";
}
    echo "matched: " . $val[0] . "<br>\n";
    echo "part 1: " . htmlentities($val[1]) . "<br>\n";
    echo "part 2: " . htmlentities($val[3]) . "<br>\n";
    echo "part 3: " . htmlentities($val[4]) . "<br>\n<br>\n";
    echo "result: " . $finished_string."<br>\n<br>\n";
}

//}
?>

Nogle bud på hvad der kan være galt ?