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What is the purpose of the "value" attribute in HTML <option> tags?

The "value" attribute in HTML <option> tags is used to specify the value that will be submitted to the server when the form is submitted. This value i...

What are some best practices for handling external links within a PHP navigation menu?

When handling external links within a PHP navigation menu, it is important to properly sanitize and validate the URLs to prevent security vulnerabilit...

What is the significance of the error "header already sent by" in PHP scripts?

The error "header already sent by" in PHP scripts occurs when there is output (such as HTML, whitespace, or error messages) sent to the browser before...

How can CSS code be optimized and integrated into a PHP project for better styling?

To optimize CSS code and integrate it into a PHP project for better styling, you can use a CSS preprocessor like SASS or LESS to write cleaner and mor...

What best practice can be suggested to automatically refresh a page in PHP, and what common mistake should be avoided when implementing this feature?

To automatically refresh a page in PHP, you can use the header() function to set a refresh meta tag in the HTML header. This will instruct the browser...