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Patrick
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January 14, 2018 at 2:28 pm
Hi, I’m writing a custom script and need to get a field’s value in a callback function on the wp_insert_post_data hook, which is fired before the field is saved using the Save Draft button in the event edit view. For some reason, I am unable to get and ACF custom field using $_POST[] when on an Event edit page. Any help would be appreciated.
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Josh
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January 15, 2018 at 2:41 pm
The fields should be available from $_POST['meta']
If you add the following code to your plugin:
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 );
}
}
}
}
add_filter( 'wp_insert_post_data', 'filter_handler', '99', 2 );
function my_filter_handler( $data , $postarr ) {
global $_POST;
write_log($_POST['meta']);
return $data;
}
Then have WP_DEBUG activated with WP_DEBUG_LOG also set to true, does your debug.log file have the meta key and value pair?
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Patrick
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January 15, 2018 at 5:09 pm
Hi Josh,
Thank you for your debugging recommendation ! I found the problem.
ACF does not use the field name in html forms. The field name is only available when the meta field is saved. Instead, they use this structure : [‘acf’][‘field_xxxxxxxxxx’] where we need to pass the field key as the second identifier. So it is possible to get the form field using $value = $_POST['acf']['field_xxxxxxxxxx'];
Cheers !
Patrick
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