What are some best practices for logging errors in PHP to troubleshoot upload issues?

When troubleshooting upload issues in PHP, it's crucial to log any errors that occur during the process. One best practice is to use the error_log() function to write errors to a log file for later review. Additionally, utilizing PHP's built-in error handling functions like set_error_handler() can help capture and handle errors more effectively. 

// Set custom error handler to log errors
function customErrorHandler($errno, $errstr, $errfile, $errline) {
    error_log("Error: [$errno] $errstr in $errfile on line $errline");
}

set_error_handler("customErrorHandler");

// Example code for uploading file
if ($_FILES['file']['error'] > 0) {
    error_log("File upload error: " . $_FILES['file']['error']);
    // Handle error accordingly
} else {
    // Process file upload
}

Keywords

error logging PHP troubleshooting upload issues best practices

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