array-filter

I want to filter an array, using the array_filter function. It hints at using call_user_func under water, but does not mention anything about how to use within the context of a class/object. Some pseudocode to explain my goal: class RelatedSearchBlock { //... private function get_filtered_docs() { return array_filter($this->get_docs(), 'filter_item'); } private filter_item() { return ($doc->somevalue == 123) } } Would I need to change 'filter_item' into array($this, 'filter_item') ? Is what I want possible at all? Yes: return array_filter($this->get_docs(), array($this, 'filter_item')); See

I have setup in Wordpress a custom post type ( Artists )... I have a plugin that serializez the meta information from the Artists .. and i need to filter this information by channel ..: "channel";s:6:"trance" which is also in the serialized meta "show_data" 'a:1:{s:32:"57fba1b113187b95554339a0737e0309";a:7:{s:7:"dj_name";s:7:"DjValue";s:9:"show_name";s:9:"ShowValue";s:7:"channel";s:6:"trance";s:10:"show_image";s:0:"";s:4:"time";s:1:"0";s:8:"time_end";s:1:"0";s:4:"mon1";s:1:"1";}}' The plugin unserializez the data like this : foreach ( $djs as $dj ) { $temp = maybe_unserialize( get_post_meta(

I am new to PHP. This is my code from our mailing.php. When a user submits a request, there are 5-7 select-able fields and 20-25 fields that end up not being selected. The output lists all fields and values regardless of whether they are empty or have been selected. I understand I need to use either unset or array_filter , but cannot figure out how and where I need to insert into code. if($_POST && count($_POST)) { $body = ''; foreach($_POST as $key=>$value) $body .= $key . ": " . $value . "\r\n"; mail("email@email.com", "Email Received at email@email.com", $body); You can try this if($_POST &

OK, there are a lot of examples of duplicate detection and removal in php arrays, using array_unique() etc but what if you want to find dups, modify them, check again in a loop until all dups are now unique? I think it's something like using array_filter()... so as a more specific example, here's what would come out of a sql statement something like this: SELECT id, list.comboname FROM list INNER JOIN ( SELECT comboname FROM list GROUP BY comboname HAVING count(id) > 1 ) dup ON list.comboname = dup.comboname To an array of the duplicates in the table: Array ( [0] => 49 [1] => big.dup [2] =>

Warning: array_filter() expects parameter 2 to be a valid callback, function 'empty' not found or invalid function name.... Why is empty considered a invalid callback? $arr = array_filter($arr, 'empty'); This works: if(empty($arr['foo'])) die(); Answer empty() is not a function but a language construct and array_filter() can only accept a function as its callback. This is given as a small note on the manual page: Note: Because this is a language construct and not a function, it cannot be called using variable functions Work around To work around this you can wrap empty in another function for