Help with preg_replace and arrays

multimediavt

Ok, this little script is supposed to make my life easier by automatically generating links for matched strings, but it's not replacing properly with the $links element that corresponds with the $terms element. It's just putting "Array" in where the corresponding $links element should be. The examples for this function on the php.net site are atrocious for beginners, btw.

<?php

$what = $_POST['url'];

$source = file_get_contents($what);

$terms = explode(",", file_get_contents('engTerms.txt'));

$links = explode(",", file_get_contents('engLinks.txt'));

$whatsnew = preg_replace($terms, '<a href="' . $links . '">$0</a>', $source);

echo $whatsnew;

Please note that '/' have been added to the terms and I've tried to reference the $terms key, but that key seems to always eval to '0' so I get the first link in $links in all the replacements! UGH! This SHOULD be really easy to do!!!

NogDog

preg_replace() will only grab the array element from $links that corresponds to the matched element in $terms if the second parameter is only the array $links. By embedding $links within a string, you are now supplying a single string as the second parameter, so no such array correspondence occurs.

Off hand I don't see a simple solution for what you are trying to do, but let me think about it....

NogDog

This seems to work:

$terms = array(
   "/test/i",
   "/example/i",
   "/sample/i"
);
$links = array(
   '<a href="test.php">\\0</a>',
   '<a href="test.html">\\0</a>',
   '<a href="../cwr/index.php">\\0</a>'
);
$text = "This is a test. I'm using it as an example for this sample text.";
echo preg_replace($terms, $links, $text);

multimediavt

Thanks a bunch! I didn't even think of trying to put the back reference into the link string reference. I think I can take it from there. I owe you a beer.

NogDog

multimediavt wrote:
Thanks a bunch! I didn't even think of trying to put the back reference into the link string reference. I think I can take it from there. I owe you a beer.

I'll have a Yuengling "Black and Tan", please. 🙂