How can one effectively troubleshoot unexpected parse errors in PHP scripts?

To effectively troubleshoot unexpected parse errors in PHP scripts, carefully review the line of code where the error is occurring and check for missing or mismatched parentheses, brackets, or quotes. Additionally, ensure that all semicolons are correctly placed at the end of each line. Use an IDE or text editor with syntax highlighting to easily identify syntax errors.

// Example code snippet demonstrating how to fix a parse error caused by a missing semicolon
<?php
    $variable1 = "Hello"
    $variable2 = "World";
    echo $variable1 . " " . $variable2;
?>