Handling form submissions and processing user input in PHP Mocktest

The correct attribute used in an HTML form to specify where to send the form data is action. The action attribute defines the URL where the form data will be submitted.

The PHP superglobal array used to retrieve form data sent with the POST method is $_POST. The $_POST array contains key-value pairs of data sent to the script via the HTTP POST method.

The isset() function in PHP is used to check if a variable is set and is not NULL. It returns true if the variable exists and is not null; otherwise, it returns false. When handling form submissions, isset() is commonly used to check if form fields are submitted and have values.

The attribute of the HTML <form> element that specifies the HTTP method to be used when submitting the form data is method. The method attribute defines the HTTP method to be used (such as POST or GET) when submitting the form.

The correct attribute used in an HTML form to specify where to send the form data is action. The action attribute defines the URL where the form data will be submitted.

The PHP superglobal array used to retrieve form data sent with the POST method is $_POST. The $_POST array contains key-value pairs of data sent to the script via the HTTP POST method.

The isset() function in PHP is used to check if a variable is set and is not NULL. It returns true if the variable exists and is not null; otherwise, it returns false. When handling form submissions, isset() is commonly used to check if form fields are submitted and have values.

The attribute of the HTML <form> element that specifies the HTTP method to be used when submitting the form data is method. The method attribute defines the HTTP method to be used (such as POST or GET) when submitting the form.

The mysql_real_escape_string() function is used to escape special characters in a string for use in an SQL statement. This helps prevent SQL injection attacks by escaping characters that could be used to manipulate the SQL query.

The htmlspecialchars() function is used to convert special characters to HTML entities. This is important when displaying user input on a web page to prevent Cross-Site Scripting (XSS) attacks.