Search results for: "Browser compatibility"

What is the purpose of using ob_start() at the beginning of a PHP file and how does it relate to header() function calls?

When using the header() function in PHP to send HTTP headers, it is important to call ob_start() at the beginning of the file to buffer the output. Th...

What are the common causes of the "Cannot send session cache limiter - headers already sent" warning in PHP?

The "Cannot send session cache limiter - headers already sent" warning in PHP occurs when there is whitespace or output sent before session_start() fu...

How can PHP scripts be used to display images from a protected folder with a .htaccess file?

To display images from a protected folder with a .htaccess file using PHP, you can create a PHP script that reads the image file from the protected fo...

How can PHP developers prevent common security vulnerabilities such as SQL injection and cross-site scripting?

To prevent SQL injection, PHP developers should use prepared statements with parameterized queries instead of directly inserting user input into SQL q...

What are some common pitfalls when trying to display images in PHP, and how can they be avoided?

One common pitfall when displaying images in PHP is not setting the correct content type header before outputting the image. This can result in the im...