How can PHP developers troubleshoot and debug white screen errors that occur when running PHP scripts, especially after making modifications?

To troubleshoot and debug white screen errors in PHP scripts, developers can enable error reporting, check for syntax errors, review log files for clues, and use debugging tools like Xdebug. After making modifications, it's important to carefully review the changes and test the script incrementally to identify the source of the error. 

// Enable error reporting
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Check for syntax errors
if (ini_get('display_errors')) {
    ini_set('display_errors', 0);
    $result = eval('return true; ' . $phpCode);
    if ($result === false) {
        echo 'Syntax error: ' . $phpCode;
    }
}

// Review log files for clues
error_log('An error occurred: ' . $errorMessage);

// Use Xdebug for more advanced debugging
xdebug_start_trace();

Keywords

PHP debugging troubleshooting white screen error modifications

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