PHP programming can be powerful and flexible, but it is not without its challenges. One of the most significant issues developers face is encountering bugs that can affect the functionality of their applications. Here, we will explore the top 10 common PHP bugs and provide practical solutions for each. Understanding these bugs is crucial for maintaining a robust and error-free codebase.

1. Syntax Errors: Often caused by missing semicolons or mismatched braces, syntax errors can halt script execution. Use a code editor with syntax highlighting to catch these issues early.
2. Undefined Variables: Accessing variables that have not been initialized can lead to errors. Always initialize your variables before use.
3. Function Redefinition: Attempting to declare a function that already exists will throw a fatal error. Use function_exists() to check if a function is already defined.
4. Database Connection Failures: These can occur due to incorrect credentials or server issues. Implement error handling to manage connection attempts gracefully.
5. Incorrect Data Types: PHP is loosely typed, which can result in unexpected behaviors. Type hinting functions or using strict_types can help maintain data integrity.
6. Misconfigured PHP Settings: Check your php.ini file for errors in configuration settings that might lead to unexpected behavior.
7. Not Using Prepared Statements: Failing to use prepared statements can expose your application to SQL injection attacks. Always use PDO or MySQLi for database queries.
8. File Inclusion Vulnerabilities: Be cautious with user inputs that can include files. Validate and sanitize filenames to prevent these vulnerabilities.
9. Variable Scope Issues: Understanding variable scope can prevent unexpected results. Always declare variables in the correct scope to avoid accessibility issues.
10. Error Reporting Off: Not enabling error reporting can make it hard to debug issues. Set error_reporting(E_ALL); and ini_set('display_errors', 1); to improve visibility.

Debugging is an essential aspect of PHP development, as it allows developers to identify and resolve issues in their code systematically. One of the most effective techniques is to use var_dump() and print_r() functions to inspect variables' values and data types. These functions can provide detailed information, making it easier to track down problems. Additionally, employing a robust integrated development environment (IDE) can significantly enhance your debugging workflow. Most modern IDEs offer built-in debugging tools, such as breakpoints, watches, and step-through capabilities, allowing for more precise examination of your code's execution.

Another valuable strategy for PHP debugging involves implementing error reporting. By enabling error reporting through the error_reporting() function and configuring the display_errors directive in your php.ini file, you can reveal hidden issues in your application during development. This visibility helps catch warnings and notices that could lead to more significant problems down the line. Lastly, consider using version control systems like Git, which not only help track changes but also allow you to revert to previous code states, making it easier to pinpoint when a bug was introduced.

When it comes to coding in PHP, it's essential to keep an eye out for common errors that can disrupt your application's performance. If you notice unexpected behavior, such as frequent crashes or slow page loads, these can be signs that your PHP code is 'partying too hard.' Here are a few warning signs to watch for:

1. Syntax Errors: A simple typo can lead to a syntax error, preventing your code from executing.
2. Undefined Variables: Using variables that haven't been defined can cause your scripts to break.

Another critical aspect to consider is the use of best practices in your PHP development. Ignoring conventions can lead to messy, unreadable code that is difficult to debug. Pay attention to the following signs:

1. Inconsistent Formatting: If your code is not well-indented or lacks consistency in naming conventions, it can become a significant source of confusion.
2. Excessive Error Reporting: If your application is throwing up too many warnings or errors, it indicates a need to clean up your code.