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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Meta tags for social share links or images

Facebook Meta Tags <meta http-equiv=”Content-Type” content=”text/html; charset=utf-8″ > <title></title> <meta name=”viewport” content=”width=device-width, initial-scale=1″> <meta name=”keywords” content=”” > <meta name=”description” content=””> <!–FACEBOOK–> <meta property=”og:title” content=”” > …

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Facebook share link with more than one image

Facebook share link with more than one image <meta property=”og:image” content=”https://images-na.ssl-images-amazon.com/images/I/41LH4pXAe6L.jkhjk000_.jpg” /> <meta property=”og:image” content=”https://images-na.ssl-images-amazon.com/images/I/41LH4pXAe6L.jkhjk000_.jpg” /> <meta property=”og:image” content=”https://images-na.ssl-images-amazon.com/images/I/41LH4pXAe6L.jkhjk000_.jpg” />

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