Hi all,
Ever since i added this code:
`///*error starts
function add_acf_form_head(){
global $post;
if ( !empty($post) && has_shortcode( $post->post_content, ‘my_acf_user_form’ ) ) {
acf_form_head();
}
}
add_action( ‘wp_head’, ‘add_acf_form_head’, 7 );
//error ends
I debugged it and have this Warning: Cannot modify header information – headers already sent by (output started at /home/customer/www/uskutech.com/public_html/wp-content/themes/hestia-pro/header.php:30) in /home/customer/www/uskutech.com/public_html/wp-includes/pluggable.php on line 1281
Can someone tell me what’s wrong?
The documentation for acf_form_head() says:
This function must be placed before any HTML has been output, preferably above the get_header() function of your theme file.
Sounds like you cannot append that to wp_head, you need to place it in your template, right before get_header(), or you need to use a different action hook, perhaps get_header?
Thanks for your prompt response @vipstephan !
It’s currently in the functions.php but I’ll move it to the page.php and see if that works 🙂
Hello, I’m currently experiencing the same thing, I’m getting a blank screen after form update/ submission.
It was working fine until the latest version of WordPress and an upgrade to PHP 7.4.
Did you ever solve this problem?
My code to generate the form.
acf_form(array(
'id' => 'acf-form-quick',
'post_title' => false,
'post_content' => true,
'field_groups' => array('group_5a3824afd298b','group_5cb4e53b433ea','group_583f59f20ee1','group_5a38276e809f8','group_5a3827b18c5c0','group_57f6b7add6a3d'),
'submit_value' => __('Update Project', 'acf'),
'html_submit_button' => '<input type="submit" class="acf-button uk-button uk-button-primary btn3d uk-margin-large-bottom uk-align-center" value="%s" />',
'return' => '%post_url%'
));
For those getting a white screen, turn on debugging so you can actually see what the error is. https://codex.wordpress.org/WP_DEBUG
My current Debug output:
Deprecated: wp_make_content_images_responsive is deprecated since version 5.5.0! Use wp_filter_content_tags() instead. in /home/ceobcmor/public_html/sepa/wp-includes/functions.php on line 5316
Deprecated: wp_make_content_images_responsive is deprecated since version 5.5.0! Use wp_filter_content_tags() instead. in /home/ceobcmor/public_html/sepa/wp-includes/functions.php on line 5316
Deprecated: wp_make_content_images_responsive is deprecated since version 5.5.0! Use wp_filter_content_tags() instead. in /home/ceobcmor/public_html/sepa/wp-includes/functions.php on line 5316
Deprecated: wp_make_content_images_responsive is deprecated since version 5.5.0! Use wp_filter_content_tags() instead. in /home/ceobcmor/public_html/sepa/wp-includes/functions.php on line 5316
Notice: Trying to access array offset on value of type bool in /home/ceobcmor/public_html/sepa/wp-content/plugins/facetwp/includes/integrations/acf/acf.php on line 214
Warning: Cannot modify header information - headers already sent by (output started at /home/ceobcmor/public_html/sepa/wp-content/themes/SEPA-UIkit/template-parts/header-content.php:1) in /home/ceobcmor/public_html/sepa/wp-includes/pluggable.php on line 1355
Warning: Cannot modify header information - headers already sent by (output started at /home/ceobcmor/public_html/sepa/wp-content/themes/SEPA-UIkit/template-parts/header-content.php:1) in /home/ceobcmor/public_html/sepa/wp-includes/pluggable.php on line 1358
I’m working to try and resolve these. I did, disable facetwp and it made no difference.
you need to do a search of your plugins code and figure out what plugin is calling this function, could also be in the theme.
Seems like an issue with acf_form, I’ve tried using a plugin Advanced forms to do something similar, and it submits no issues. I’d rather stick to the original acf-form if possible.
This is where the warnings are pointing to in pluggable.php
/**
* Filters the X-Redirect-By header.
*
* Allows applications to identify themselves when they're doing a redirect.
*
* @since 5.1.0
*
* @param string $x_redirect_by The application doing the redirect.
* @param int $status Status code to use.
* @param string $location The path to redirect to.
*/
$x_redirect_by = apply_filters( 'x_redirect_by', $x_redirect_by, $status, $location );
if ( is_string( $x_redirect_by ) ) {
header( "X-Redirect-By: $x_redirect_by" );
}
header( "Location: $location", true, $status );
return true;
}
endif;
I Figured out the issue causing the problem in my case.
The block of code that contained acf_formhead() was being included using locate_template().
I changed the the way I included that block to use a regular include() instead and my problem was fixed.
