Turning on Debug mode in wp-config.php

wp-config.php

/**
 * When you are building your code (i.e. in development), you should turn on 
 * all error reporting in wp-config.php. Why? Because you want to find all 
 * warnings, notices, errors, etc. before you ship it to your client. Even 
 * the minor errors are telling you something is wrong in the code. 
 * Suppressing them does not fix the problem. It merely quiets them down.
 *
 * @link https://codex.wordpress.org/Debugging_in_WordPress
 */

// turns on the WordPress debug mode. It will then show all PHP errors, 
// notices, and warnings. You want to see these when you are building and testing.
define('WP_DEBUG', true);

// will save the errors into a debug.log file inside of your wp-content folder. 
// It gives you a record of the errors to help you to find the problems.
define( 'WP_DEBUG_LOG', true );

// will show the errors on the pages. If you set it to false, then all 
// errors are hidden.
define( 'WP_DEBUG_DISPLAY', true );

// forces WordPress to load the full version of scripts and stylesheets 
// rather than the minified versions. That’s handy in debug/build mode.
define( 'SCRIPT_DEBUG', true );


// Uncomment when you are working on profiling and tuning performance. 
// define( 'SAVEQUERIES', true );