Reply To: Get field key by field name

• wells5609

• August 22, 2013 at 11:10 am

The “real” answer: go to the Field Group admin page, click the “display field key” button in help dropdown, then copy & paste the key into code.

Maybe closer to the answer you’re looking for:

 function acf_field_key($field_name, $post_id = false){
	
	if ( $post_id )
		return get_field_reference($field_name, $post_id);
	
	if( !empty($GLOBALS['acf_register_field_group']) ) {
		
		foreach( $GLOBALS['acf_register_field_group'] as $acf ) :
			
			foreach($acf['fields'] as $field) :
				
				if ( $field_name === $field['name'] )
					return $field['key'];
			
			endforeach;
			
		endforeach;
	}
        return $field_name;
}

However, this only works for fields registered with PHP via register_field_group().