Useful WordPress Snippets

wp-snippets.php

<?php
/****
 * Automatic Linking to Twitter Usernames within a post
 ****/
 function content_twitter_mention($content) {
    return preg_replace('/([^a-zA-Z0-9-_&amp;])@([0-9a-zA-Z_]+)/', "$1@$2", $content);
}
add_filter('the_content', 'content_twitter_mention');
add_filter('comment_text', 'content_twitter_mention');

/****
 * Redirect New Registered Users to a Specific Page
 ****/
 function wps_registration_redirect(){
    return home_url( '/finished/' );
}
add_filter( 'registration_redirect', 'wps_registration_redirect' );

/****
 * Show a Post Date and Modified Date
 ****/
$u_time = get_the_time('U');
$u_modified_time = get_the_modified_time('U');

if ($u_modified_time != $u_time) {
    echo "Last modified on ";
    the_modified_time('F jS, Y');
    echo ". ";
}

/****
 * Remove the Comment URL Field
 ****/
 function remove_comment_fields($fields) {
unset($fields['url']);
    return $fields;
}
add_filter('comment_form_default_fields','remove_comment_fields');

/****
 * Show X Results on the Search Results Page
 ****/
 function limit_posts_per_search_page() {
	if ( is_search() )
		set_query_var('posts_per_archive_page', 20); 
}

add_filter('pre_get_posts', 'limit_posts_per_search_page');
 
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