Hide Database Connection File
A database connection file may contain confidential information like the following: <?php ... $user = "steven"; $pass = "password"; $options = "..."; $dbh = new… Read More »Hide Database Connection File
$_SERVER
Notice: Undefined index: HTTP_REFER
$_SERVER['HTTP_REFERER'] Generally, you don't need using function isset() to test the existence of every $_SERVER element before using, because they seems always available to use.… Read More »Notice: Undefined index: HTTP_REFER
How to Use $_SERVER['QUERY_STRING'] Properly
$_SERVER['QUERY_STRING'] Let's see a snippet of PHP code, which will generate three similar output: <?php echo $_SERVER['QUERY_STRING'] . "<br />"; echo urldecode($_SERVER['QUERY_STRING']) . "<br />";… Read More »How to Use $_SERVER['QUERY_STRING'] Properly
How to Submit Form to Current Page on Change with PHP and JavaScript
$_SERVER['PHP_SELF'] You might want the web page to change when users change the menu. Here I introduce a PHP code snippet incorporated with Javascript to… Read More »How to Submit Form to Current Page on Change with PHP and JavaScript
How to Distinguish the Scope of Superglobals in PHP
The superglobals in PHP are: $GLOBALS $_SERVER $_GET $_POST $_FILES $_COOKIE $_SESSION $_REQUEST $_ENV Don't be confused by the name of superglobals, their scopes vary… Read More »How to Distinguish the Scope of Superglobals in PHP