{"id":12362393,"date":"2020-01-24T17:25:36","date_gmt":"2020-01-24T17:25:36","guid":{"rendered":"https:\/\/wordpress.org\/support\/topic\/array-to-string-conversion-notice\/"},"modified":"2020-01-24T17:30:13","modified_gmt":"2020-01-24T17:30:13","slug":"array-to-string-conversion-notice","status":"publish","type":"topic","link":"https:\/\/wordpress.org\/support\/topic\/array-to-string-conversion-notice\/","title":{"rendered":"Array to String Conversion Notice"},"content":{"rendered":"

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

The notice I’m seeing in my log is:
\n[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<\/code><\/p>\n

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

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

To this:<\/p>\n

$output = $m[1] . call_user_func( $shortcode_tags[ $tag ], $attr, $content, $tag ) . $m[6];\n\tset_error_handler( function( $errno, $errstr, $errfile, $errline, $errcontext ) {\n\t    \/\/ error was suppressed with the @-operator\n\t    if ( 0 === error_reporting() ) { return false; }\n\t    throw new ErrorException( $errstr, 0, $errno, $errfile, $errline );\n\t});\n\ttry {\n\t\t$output = $m[1] . call_user_func( $shortcode_tags[ $tag ], $attr, $content, $tag ) . $m[6];\n\t} catch( ErrorException $e ) {\n\t\tfc_debug_log( array(\n\t\t\t\/\/'error' => $e,\n\t\t\t'message' => $e->getMessage(),\n\t\t\t'function_name' => $shortcode_tags[ $tag ],\n\t\t\t'attributes' => $attr,\n\t\t\t\/\/'content' => $content,\n\t\t\t'tag' => $tag,\n\t\t\t'm1' => $m[1],\n\t\t\t'm6' => $m[6]\n\t\t) );\n\t}\n\trestore_error_handler();<\/code><\/pre>\n
Elsewhere in the file, I have this function for logging to my debug.log file:<\/p>\n
function fc_debug_log($obj)\n{\n    if (is_array($obj) || is_object($obj)) {\n        error_log(print_r($obj, true));\n    } else {\n        error_log($obj);\n    }\n}<\/code><\/pre>\n
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:<\/p>\n
[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\n[24-Jan-2020 17:14:35 UTC] Array\n(\n    [message] => Array to string conversion\n    [function_name] => Array\n        (\n            [0] => Skyword_Shortcode Object\n                (\n                )\n\n            [1] => customfields_shortcode\n        )\n\n    [attributes] => \n    [tag] => cf\n    [m1] => \n    [m6] => \n)<\/code><\/pre>\n
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.<\/p>\n","protected":false},"template":"","class_list":["post-12362393","topic","type-topic","status-publish","hentry","topic-tag-array-to-string-conversion"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic\/12362393","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic"}],"about":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":1,"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic\/12362393\/revisions"}],"predecessor-version":[{"id":12362409,"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic\/12362393\/revisions\/12362409"}],"wp:attachment":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/media?parent=12362393"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}