PHP - Preg Replace Error

i keep getting this at top of page
Warning: preg_replace() [function.preg-replace]: No ending delimiter '`' found in C:\xampp\htdocs\socialtscripts\activation.php on line 16
here is the code that it is reffering to
Code: [Select]
preg_replace("`", "", $id);

i get the following error in the comments in wordpress blog..:

Warning: preg_replace() [function.preg-replace]: No ending delimiter '~' found in /home/doughhhh/public_html/wp-content/themes/upload/includes/theme-comments.php on line 75

the content of the file is:

Code: [Select]
<?php
// Fist full of comments
if (!function_exists("custom_comment")) {
function custom_comment($comment, $args, $depth) {
   $GLOBALS['comment'] = $comment; ?>
                 
<li <?php comment_class(); ?>>
   
    <a name="comment-<?php comment_ID() ?>"></a>
     
      <div id="li-comment-<?php comment_ID() ?>" class="comment-container">

      <div class="comment-head">
         
          <?php if(get_comment_type() == "comment"){ ?>
                <div class="avatar"><?php the_commenter_avatar($args) ?></div>
            <?php } ?>       
       
<div class="reply">
                    <?php comment_reply_link(array_merge( $args, array('depth' => $depth, 'max_depth' => $args['max_depth']))) ?>
                </div><!-- /.reply -->                   
                 
</div><!-- /.comment-head -->
     
    <div class="comment-entry"  id="comment-<?php comment_ID(); ?>">
   
    <span class="arrow"></span>
   
    <div class="comment-info">
   
    <div class="left"><span class="name"><?php the_commenter_link() ?></span></div>
    <div class="right">       
                <span class="date"><?php echo get_comment_date(get_option( 'date_format' )) ?> <?php _e('at', 'themejunkie'); ?> <?php echo get_comment_time(get_option( 'time_format' )); ?></span>
                <span class="perma"><a href="<?php echo get_comment_link(); ?>" title="<?php _e('Direct link to this comment', 'themejunkie'); ?>">#</a></span>
                 <span class="edit"><?php edit_comment_link(__('Edit', 'themejunkie'), '', ''); ?></span>
</div>
 
  <div class="clear"></div>
 
</div>

<?php comment_text() ?>
           
<?php if ($comment->comment_approved == '0') { ?>
                <p class='unapproved'><?php _e('Your comment is awaiting moderation.', 'themejunkie'); ?></p>
            <?php } ?>

</div><!-- /comment-entry -->

</div><!-- /.comment-container -->

<?php 
}
}

// PINGBACK / TRACKBACK OUTPUT
if (!function_exists("list_pings")) {
function list_pings($comment, $args, $depth) {

$GLOBALS['comment'] = $comment; ?>

<li id="comment-<?php comment_ID(); ?>">
<span class="author"><?php comment_author_link(); ?></span> -
<span class="date"><?php echo get_comment_date(get_option( 'date_format' )) ?></span>
<span class="pingcontent"><?php comment_text() ?></span>

<?php 
} 
}

if (!function_exists("the_commenter_link")) {
function the_commenter_link() {
    $commenter = get_comment_author_link();
    if ( preg_match( '~]* class=[^>]+>~', $commenter ) ) {$commenter = preg_replace( '~(]* class=[\'"]?)~', '\\1url ' , $commenter );
    } else { $commenter = preg_replace( '~(<a )/', '\\1class="url "~' , $commenter );}
    echo $commenter ;
}
}

if (!function_exists("the_commenter_avatar")) {
function the_commenter_avatar($args) {
    $email = get_comment_author_email();
    $avatar = str_replace( "class='avatar", "class='photo avatar", get_avatar( "$email",  $args['avatar_size']) );
    echo $avatar;
}
}

?>

help!

[attachment deleted by admin]

im having trouble using this function. im trying to change the strings within a post.

eg:

Code: [Select]
This is an example post
[attachment=file.png]

what im trying to do is change [attachment=file.png] to file.png.

Here is the code i have but it doesnt change anything.


$p_content = str_replace('<br>', '', $post_info[$key]['p_content']);
        $attach = preg_split('|\[attachment=|', $p_content);
        
        for($i=0; $i<count($attach); $i++)
        {
            $attach[$i] = str_replace(']', '', $attach[$i]);
            if(file_exists($config['asf_root'].'attachments/'.$attach[$i]))
            {
                $p_content = preg_replace('|\[attachment=([0-9a-zA-Z\.-_])\]|#i', $attach[$i], $p_content);
            }
        }
        echo $p_content;


it first gets all the attachment tags within the post then applies the preg replace to all of them. But the preg replace isnt replacing, so i must have gone wrong somewhere.
Any tips/ideas?

Thanks

$name = preg_replace('{(\d+)}', convertNumber("$1"), $row['name']); 


why isnt this working?

basically what i am trying to do is replace the

<a href="whatever.com"> 

with

<a href="whatever.com" onclick = "if (! confirm("Continue?")) return false;">

so that when the user clicks the url in a message the box pops up first then redirects them to the url if they click confirm. However i am getting the following error:

Code: [Select]
Warning: preg_replace() [function.preg-replace]: Compilation failed: reference to non-existent subpattern at offset 11
here is the code i used.

$message_content = $content_info['message_content'];
$pattern='<a href="\\1">';
$replace='<a href="\\1" onclick = "if (! confirm("Continue?")) return false;">';
$message_content = preg_replace($pattern, $replace, $message_content);
echo $message_content;

Anyone know where i went wrong?