How can PHP developers effectively troubleshoot errors in their code, especially when dealing with output issues?

When troubleshooting output issues in PHP code, developers can start by checking for syntax errors, ensuring proper variable declarations, and verifying that the correct output functions are being used. It's also helpful to use debugging tools like var_dump() or print_r() to inspect variable values and data structures. By systematically reviewing the code and using these debugging techniques, developers can identify and resolve output issues efficiently.

// Example code snippet demonstrating the use of var_dump() for troubleshooting output issues
$variable = "Hello, World!";
var_dump($variable);