Codeigniter – How to Join City Country State by concatenate two fields in Sql

Codeigniter – How to Join City Country State by concatenate two fields in Sql $this->db->select(” CONCAT(c.name,’-‘,co.code) as id,CONCAT(c.name,’ ,’,s.name,’ ,’,co.name) as text”,FALSE); $this->db->from(“city c”); $this->db->join(‘state …

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How to prevent duplicate usernames when people register? PHP/MySQL

$connect = mysql_connect(‘whatever’,’whatever’,’whatever’); $database = mysql_select_db(‘your dbname’); $username = $_POST[‘username’]; if(isset($username)){ $mysql_get_users = mysql_query(“SELECT * FROM table_name where username=’$username'”); $get_rows = mysql_affected_rows($connect); if($get_rows >=1){ echo …

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