Enabling and disabling the PHP output_buffering directive

The output_buffering directive in PHP controls how output is sent to the client. By default, PHP sends output in multiple chunks as the script runs. When output_buffering is enabled, PHP stores the output in memory and sends it only after the script finishes processing.

Why Use output_buffering?

• Send headers after output begins: Useful when you need to modify headers even after content has started.
• Improve performance: Reduces the number of packets sent to the client, which can speed up page loads.
• Control output flow: Allows developers to flush output at specific times.

How to Enable output_buffering

Method 1: Using php.ini

Edit or create a custom php.ini file in your application directory:

output_buffering = On

You can also specify a buffer size:

output_buffering = 16384

This sets the maximum buffer size to 16 KB.

Method 2: Using .user.ini

If your hosting environment supports .user.ini, add:

output_buffering = On

Method 3: Using .htaccess

On Apache servers, you can override the directive:

php_value output_buffering On

How to Disable output_buffering

Method 1: Using php.ini

output_buffering = Off

Method 2: Using .user.ini

output_buffering = Off

Method 3: Using .htaccess

php_value output_buffering Off