WHICH ONE IS BETTER FOR NEWBIE?

DROP PROCEDURE IF EXISTS w_array;
DELIMITER /w/
CREATE PROCEDURE w_array (w_arr  VARCHAR(36))
BEGIN
WHILE (LOCATE(',', w_arr) > 0)
DO
        SET @w = LOCATE(',', w_arr);
    SET @wtab = SUBSTRING_INDEX(w_arr,',',1);
    SET @wtab = CONCAT('grab_reviews_',@wtab);

        SET @wtmp =  CONCAT('UPDATE  ',@wtab,' SET asin=exact_asin ');
        PREPARE  stmt FROM @wtmp ;
        EXECUTE  stmt  ;
        DROP PREPARE stmt;

        SET w_arr=SUBSTRING(w_arr,@w+1);

END WHILE;

    SET @wtab = CONCAT('grab_reviews_',w_arr);
        SET @wtmp =  CONCAT('UPDATE  ',@wtab,' SET asin=exact_asin ');
        PREPARE  stmt FROM @wtmp ;
        EXECUTE  stmt  ;
        DROP PREPARE stmt;

END/w/
DELIMITER;
CALL w_array('us,jp,uk,de,fr,ca,es,it,mx,in');

<?php
$warr = array('us', 'jp', 'uk', 'de', 'fr', 'ca', 'es', 'it', 'mx', 'in');
$sql = 'UPDATE grab_reviews_';
$w = '';
foreach ($warr AS $one) {
    $w .= 'UPDATE grab_reviews_' . $one . ' SET asin=exact_asin ; ';
}
echo $w;

DROP PROCEDURE IF EXISTS w_array;
DELIMITER /w/
CREATE PROCEDURE w_array ()
BEGIN
SET @w_arr = 'us,jp,uk,de,fr,ca,es,it,mx,in';
WHILE (LOCATE(',', @w_arr) > 0)
DO
        SET @w = LOCATE(',', @w_arr);
    SET @wtab = SUBSTRING_INDEX(@w_arr,',',1);
    SET @wtab = CONCAT('grab_reviews_',@wtab);

        SET @wtmp =  CONCAT('UPDATE  ',@wtab,' SET asin=exact_asin ');
        PREPARE  stmt FROM @wtmp ;
        EXECUTE  stmt  ;
        DROP PREPARE stmt;

        SET @w_arr=SUBSTRING(@w_arr,@w+1);

END WHILE;

    SET @wtab = CONCAT('grab_reviews_',@w_arr);
        SET @wtmp =  CONCAT('UPDATE  ',@wtab,' SET asin=exact_asin ');
        PREPARE  stmt FROM @wtmp ;
        EXECUTE  stmt  ;
        DROP PREPARE stmt;

END/w/
DELIMITER;
CALL w_array;