Html Forms Handling — Part 1 MCQs with Explanations

The POST method, data is invisible to others.

Because the data is visible to everyone.

Italic tags <i></i> might be allowable, but table tags <td></td> could potentially wreak havoc on a page.

There are seven validation filters. They are FILTER_VALIDATE_EMAIL, FILTER_VALIDATE_BOOLEAN, FILTER_VALIDATE_FLOAT, FILTER_VALIDATE_INT, FILTER_VALIDATE_IP, FILTER_VALIDATE_REGEXP, FILTER_VALIDATE_URL.

$_SERVER[‘PHP_AUTH_USER’] and $_SERVER[‘PHP_AUTH_PW’] store the username and password values, respectively.

The isset() function determines whether a variable has been assigned a value. Its prototype follows: boolean isset(mixed var [,mixed var [,…]]).

This is one of the drawbacks of Hard-coding a login pair directly into the script.

f it is not stored outside, the attacker could discover the file through brute force guessing.

Although they are similar function, you should use explode() instead of split().In fact split() function has been deprecated altogether.

Such requirements are better satisfied by implementing a database based solution.

It not only enhances administrative convenience and scalability, but also can be integrated into a larger database infrastructure.

By default its value is on.

This is relevant because particularly large files can take some time to upload, eclipsing the time set by this directive.

The max_file_limit directive sets an upper limit on the number of files which can be simultaneously uploaded.

Its default value is 16M.

$_FILEs[‘userfile’][‘error’], $_FILEs[‘userfile’][‘name’], $_FILEs[‘userfile’][‘size’], $_FILEs[‘userfile’][‘tmp_name’], $_FILEs[‘userfile’][‘type’] are the five items in the array.

Within flat files(files), within volatile memory(mm), using the SQLite database(sqlite), or through user defined functions(user).

Its prototype follows: session.save_handler = files|mm|sqlite|user.

You can change this name by using the session.name directive.

The lifetime is specified in seconds, so if the cookie should live 1 hour, this directive should be set to 3600.

The directive session.cookie_domain determines the domain for which the cookie is valid.

The directive which determines this is session.cache_expire.

The session.gc_maxlifetime directive determines this duration. It can be set to any required value.

This will not completely remove the session from the storage mechanism. If you want to completely destroy the session, you need to use the function session_destroy().

You need to refer the session variable ‘username’ in the context of the $_SESSION superglobal.

To delete the session variable ‘username’ we use the unset() function.

You can minimize this risk by regenerating the session ID on each request while maintaining the session-specified data. PHP offers a convenient function named session_regenerate_id() that will replace the existing ID with a new one.

By default, this behavior is disabled.

Like this:

Returns TRUE on success or FALSE on failure.

To do this, you’ need to add a file upload input to your administrative form.

Set the enctype of the form to multipart/form-data, which can accept files and standard form values.

Whenever a file is uploaded via an HTML form, that file is stored in temporary memory and information about the file is passed in the $_FILES superglobal.

You save this file in the inc folder (full path: /xampp/htdocs/simple_blog/inc/images.inc.php).

This is a special comment that provides information about a class, property, or method.

The list() function allows you to create named variables for each array index as a comma-separated list.

When you’re dealing with files uploaded through an HTML form, you have access to a special constant called UPLOAD_ERR_OK that tells you whether a file uploaded successfully.

// Determines the path to check $path = $_SERVER[‘DOCUMENT_ROOT’] . $this->save_dir;

If the path exists, is_dir() returns TRUE; otherwise, it returns FALSE.

If you needed to change the size of your images, you can change the dimensions using the above instantiation of ImageHandler