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  • I’ve tried with disabling all other plugins, the fields remain enabled. Since I’m developing my own plugin that uses ACF (and GravityForms) as dependencies, I really only have those plugins installed on an otherwise vanilla WP install in a Local machine on my Mac (using Local by Flywheel). As it is a purely dev site I’m currently just using the Twenty Seventeen theme. I can try switching themes, and will have a different theme in place (along with lots else) on the real site once my plugin is developed, but I don’t expect a default WP theme to get in the way of ACF.

  • To test I commented out the loop and if check, so my code was:

    
function tgmembership_modify_acf_field_on_load( $field ) {
	// get plugin settings
	$options = get_option( 'tgmembership_options' );
	// get names of fields that should be read-only
	$readonly_fields = array_map('trim', explode(",", $options["acf_readonly"]));
	
	// loop each readonly slug and set the disabled flag on those fields
	//foreach ($readonly_fields as $name) {
		//if ($field["name"] == $name) {
			$field['disabled'] = 1;
	//	}
	//}
	
	// return the field
	return $field;
}
add_filter('acf/load_field', 'tgmembership_modify_acf_field_on_load', 16);

    It boils down to being the same as your test. It still left the fields enabled. I set Xdebug breakpoints on the $field['disabled'] = 1; and return $field; lines. These let me verify that indeed disabled was getting set to 1. Yet still the fields are enabled on the User Profile page. I believe you that your test disabled the fields. I just don’t understand why the same isn’t happening in my code…

  • The fields that I’ve tried this with are just simple text fields.

  • Ensuring that the filter priority was more than 10 didn’t fix the problem. Here is the full code for the filter:

    
/**
 * Modify fields on load based on our advanced settings
 */
function tgmembership_modify_acf_field_on_load( $field ) {
	// get plugin settings
	$options = get_option( 'tgmembership_options' );
	// get names of fields that should be read-only
	$readonly_fields = array_map('trim', explode(",", $options["acf_readonly"]));
	
	// loop each readonly slug and set the disabled flag on those fields
	foreach ($readonly_fields as $name) {
		if ($field["name"] == $name) {
			$field['disabled'] = 1;
		}
	}
	
	// return the field
	return $field;
}
add_filter('acf/load_field', 'tgmembership_modify_acf_field_on_load', 16);

    I really think that ACF just isn’t respecting the disabled flag when adding fields to the User Profile. If that is the case then maybe I just can’t use ACF for the fields I want read-only (there are a few others I need to do manually anyway as they’re more complex, so that wouldn’t be a real problem). But I’d consider that a bug in ACF.

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