The question:
I am running some of the WP functions directly inside a plugin, including wp_insert_post(), if something goes wrong, this returns a WP Error object, what is the correct method to catch this error? Either using built in WP functions or PHP exceptions or whatnot..
The Solutions:
Below are the methods you can try. The first solution is probably the best. Try others if the first one doesn’t work. Senior developers aren’t just copying/pasting – they read the methods carefully & apply them wisely to each case.
Method 1
-
Assign return of the function to the variable.
-
Check the variable with
is_wp_error()
. -
If
true
handle accordingly, for exampletrigger_error()
with message fromWP_Error->get_error_message()
method. -
If
false
– proceed as usual.
Usage:
function create_custom_post() {
$postarr = array();
$post = wp_insert_post($postarr);
return $post;
}
$result = create_custom_post();
if ( is_wp_error($result) ){
echo $result->get_error_message();
}
Method 2
Hei,
first, you check weather your result is a WP_Error
object or not:
$id = wp_insert_post(...);
if (is_wp_error($id)) {
$errors = $id->get_error_messages();
foreach ($errors as $error) {
echo $error; //this is just an example and generally not a good idea, you should implement means of processing the errors further down the track and using WP's error/message hooks to display them
}
}
This is the usual way.
But the WP_Error object can be instanciated without any error occuring, just to act as a general error store just in case. If you want to do so, you can check if there are any errors by using get_error_code()
:
function my_func() {
$errors = new WP_Error();
... //we do some stuff
if (....) $errors->add('1', 'My custom error'); //under some condition we store an error
.... //we do some more stuff
if (...) $errors->add('5', 'My other custom error'); //under some condition we store another error
.... //and we do more stuff
if ($errors->get_error_code()) return $errors; //the following code is vital, so before continuing we need to check if there's been errors...if so, return the error object
.... // do vital stuff
return $my_func_result; // return the real result
}
If you do that, you can then check for an process the returned error just as in the wp_insert_post()
example above.
The Class is documented on the Codex.
And there’s also a little article here.
Method 3
$wp_error = wp_insert_post( $new_post, true);
echo '<pre>';
print_r ($wp_error);
echo '</pre>';
This will show you exactly what’s wrong with wordpress post insert function. just try it !
All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0