What are the potential pitfalls of using mysqli_error to retrieve error messages in PHP?

Using mysqli_error to retrieve error messages in PHP can potentially expose sensitive information about your database structure and queries to users, which can pose a security risk. It's better to handle errors more gracefully and log them internally without exposing detailed error messages to users. One way to achieve this is by using custom error handling functions in PHP. 

// Set custom error handling function
function customError($errno, $errstr, $errfile, $errline) {
    // Log the error internally
    error_log("Error: [$errno] $errstr in $errfile on line $errline");
    
    // Display a generic error message to the user
    echo "An error occurred. Please try again later.";
}

// Set the custom error handler
set_error_handler("customError");

// Your database connection and query code here

Keywords

mysqli_error error messages PHP potential pitfalls retrieval

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