Knowledge Base

PHP Errors and Warnings

PHP errors can break your website or display error messages to visitors. Here's how to troubleshoot them.

Types of PHP Errors

• Fatal Error: Stops script execution - site won't load
• Parse Error: Syntax mistake - code can't be interpreted
• Warning: Script continues but something unexpected happened
• Notice: Minor issues, script runs normally
• Deprecated: Using features that will be removed in future PHP versions

Viewing PHP Errors

Method 1: Error Log

In DirectAdmin:

1. Go to Error Log
2. View recent PHP errors with line numbers

Method 2: Enable Display (Temporarily)

Add to your PHP file temporarily:

ini_set('display_errors', 1);
error_reporting(E_ALL);

Remove after debugging!

Common Errors and Fixes

Memory Exhausted

Fatal error: Allowed memory size exhausted

Solution - increase in php.ini or .htaccess:

php_value memory_limit 256M

Maximum Execution Time

Fatal error: Maximum execution time exceeded

Solution:

php_value max_execution_time 300

Undefined Variable/Index

Notice: Undefined variable/index

Solution: Check variable exists before using:

$value = isset($_POST['field']) ? $_POST['field'] : '';

Class Not Found

Fatal error: Class 'ClassName' not found

Solution: Ensure file is included/required or autoloader is working.

PHP Version Compatibility

Some code may not work with newer PHP versions:

• Try switching PHP version in DirectAdmin
• Check if your scripts/CMS support your PHP version
• Update deprecated code

Hide Errors in Production

Never show errors to visitors. Use:

display_errors = Off
log_errors = On

Errors will be logged but not displayed.