note 106040 added to function.array-walk

Filter an array by using key. <?php $product_1 = 'test'; $product_2 = 'test 2'; function array_key_filter($array,$callback = 'trim') { $filtered = array(); array_walk($array,function ($degeri,$degisken_adi) use (&$filtered,$callback) { if($callback($degisken_adi)) { $filtered[$degisken_adi] = $degeri; } }); return $filtered; } #using $degiskenler = array_key_filter(get_defined_vars(),function($key) { return strpos($key,'product_') === 0; }); print_r($degiskenler); ?> output: Array ( [product_1] => test [product_2] => test 2 ) ---- Server IP: 160.75.100.7 Probable Submitter: 95.9.132.210 ---- Manual Page -- http://www.php.net/manual/en/function.array-walk.php Edit -- https://master.php.net/note/edit/106040 Del: integrated -- https://master.php.net/note/delete/106040/integrated Del: useless -- https://master.php.net/note/delete/106040/useless Del: bad code -- https://master.php.net/note/delete/106040/bad+code Del: spam -- https://master.php.net/note/delete/106040/spam Del: non-english -- https://master.php.net/note/delete/106040/non-english Del: in docs -- https://master.php.net/note/delete/106040/in+docs Del: other reasons-- https://master.php.net/note/delete/106040 Reject -- https://master.php.net/note/reject/106040 Search -- https://master.php.net/manage/user-notes.php