wordpress custom field as tags

any one can help he, i wanna to use tags as custom field, how this can be done, is their any functions avilable for tat, if so how i can do this

 

Not quite sure what you mean here. You can use tags however you want, but Wordpress already has custom fields in the form of meta data.

Either way, heres a function I made to extract all the tags from a specific post:

<?php
/*
 * getAllTags() returns an array of all tags associated 
 * with a post/page or false if there are none.
 * 
 * For use in wordpress templates/plugins
 */
if ( ! function_exists( 'getAllTags' ) ):   
function getAllTags($id = 0) { 
    global $wpdb;
    
    if ($id == 0) {
        global $wp_query;
        $postID = $wp_query->post->ID;
    }
    
    $sql = 'SELECT c.name
            FROM wp_term_relationships AS a
            LEFT OUTER JOIN wp_term_taxonomy AS b ON a.term_taxonomy_id = b.term_taxonomy_id
            LEFT OUTER JOIN wp_terms AS c ON b.term_id = c.term_id
            WHERE b.taxonomy = "post_tag" AND a.object_id = ' . $postID;
            
    if (!$query = mysql_query($sql)) return false;                                      
                         
    $returnArray = array();
    while ($row = mysql_fetch_row($query)) $returnArray[] = $row[0];    
    return $returnArray;    
}
endif;
?>

PHP:

 

Wordpress already has custom tags, no need to use confusing functions, it's already built in. Here's how:

Alternately, you can google for more.