Add custom log into WordPress

readme.md

add these lines to wp-config.php

//Enable Debug logging to the /wp-content/debug.log file
define('WP_DEBUG_LOG', true);

//Disable display of errors and warnings 
define('WP_DEBUG_DISPLAY', false);
@ini_set('display_errors',0);

functions.php

<?php

if(!function_exists('_log')){
  function _log( $message ) {
    if( WP_DEBUG === true ){
      if( is_array( $message ) || is_object( $message ) ){
        error_log( print_r( $message, true ) );
      } else {
        error_log( $message );
      }
    }
  }
}


// use this as _log('your message');