[WordPress - Log to error.log] #wp #core #error #debug #log

wp--log-to-error-log.php

<?php
if (!function_exists('write_log')) {

    function write_log($log) {
        if (true === WP_DEBUG) {
            if (is_array($log) || is_object($log)) {
                error_log(print_r($log, true));
            } else {
                error_log($log);
            }
        }
    }

}

// Example USAGE
if( !is_wp_error($post_id) ) :
	// ...
else :

    $error_string = $post_id->get_error_message();
    write_log( $error_string );	

endif;