Array to String Conversion Notice

There’s something up with one of your shortcodes that’s causing this PHP notice to be littered all throughout my debug.log file.

The notice I’m seeing in my log is:
[24-Jan-2020 17:14:35 UTC] PHP Notice: Array to string conversion in D:\home\site\wwwroot\wp-includes\shortcodes.php on line 325

As you can see, that is a WP core file. I’ve modified it so I could identify which shortcode was triggering it.

I modified this line in shortcodes.php (because this is the one that was having the error):
$output = $m[1] . call_user_func( $shortcode_tags[ $tag ], $attr, $content, $tag ) . $m[6];

To this:

$output = $m[1] . call_user_func( $shortcode_tags[ $tag ], $attr, $content, $tag ) . $m[6];
	set_error_handler( function( $errno, $errstr, $errfile, $errline, $errcontext ) {
	    // error was suppressed with the @-operator
	    if ( 0 === error_reporting() ) { return false; }
	    throw new ErrorException( $errstr, 0, $errno, $errfile, $errline );
	});
	try {
		$output = $m[1] . call_user_func( $shortcode_tags[ $tag ], $attr, $content, $tag ) . $m[6];
	} catch( ErrorException $e ) {
		fc_debug_log( array(
			//'error' => $e,
			'message' => $e->getMessage(),
			'function_name' => $shortcode_tags[ $tag ],
			'attributes' => $attr,
			//'content' => $content,
			'tag' => $tag,
			'm1' => $m[1],
			'm6' => $m[6]
		) );
	}
	restore_error_handler();

Elsewhere in the file, I have this function for logging to my debug.log file:

function fc_debug_log($obj)
{
    if (is_array($obj) || is_object($obj)) {
        error_log(print_r($obj, true));
    } else {
        error_log($obj);
    }
}

Anyway, I was able to identify that it’s coming from your plugin because this is what it outputted whenever I got the array to string conversion error:

[24-Jan-2020 17:14:35 UTC] PHP Notice:  Array to string conversion in D:\home\site\wwwroot\wp-includes\shortcodes.php on line 325
[24-Jan-2020 17:14:35 UTC] Array
(
    [message] => Array to string conversion
    [function_name] => Array
        (
            [0] => Skyword_Shortcode Object
                (
                )

            [1] => customfields_shortcode
        )

    [attributes] => 
    [tag] => cf
    [m1] => 
    [m6] => 
)

Is there a reason why your function name is an array and not a string? Can you please update your plugin so it does not cause this notice in WP core? Thank you.

• This topic was modified 5 years, 1 month ago by Tessa Watkins.