An upgraded version of array_column, the record set processing function.

An upgraded version of array_column, the record set processing function.

Nice: Simplified operation, batch processing of array_walk, reference, and low internal consumption. Application scenario: mainly used to process record sets (two-dimensional arrays) 1. integrate the result set (one-dimensional array, such as ids: [,]. list of winning usernames: ['xiong Ming', 'lijia ', 'erlang Shenzhen']) 2. key-value pairs (one-dimensional arrays, such as tags: array ('mysql' => 'url1', 'php' => 'url2']) 3. cached file data (id => info) Note: php5.5 is used as a built-in function. Note the naming conflict before use. From (EQPHP tool class): https://github.com/eqphp/framework/blob/master/www/class/fun.php Demo: http://www.eqphp.com/blog/list/ // Process the record set (php5.5 built-in) Static function array_column ($ data, $ key = 'id', $ column = null ){ $ Buffer = null; If ($ column ){ // K => v If (strpos ($ column, ',') = false ){ Foreach ($ data as $ value ){ $ Buffer [$ value [$ key] = $ value [$ column]; } Return $ buffer; } // K = arr $ Field = explode (',', $ column ); Foreach ($ data as $ value ){ $ Id = $ value [$ key]; Array_walk ($ value, function ($ v, $ k) use (& $ value, $ field ){ If (! In_array ($ k, $ field) unset ($ value [$ k]); }); $ Buffer [$ id] = $ value; } Return $ buffer; } // Id_arr Foreach ($ data as $ value ){ $ Buffer [] = $ value [$ key]; } Return $ buffer; } // Usage demo: // Original record set: $ Data = array ( Array ('id' => 1, 'name' => 'dubox', 'age' => 25, 'girlfriend' => 'soda green '), Array ('id' => 4, 'name' => 'Xiao chun', 'age' => 21, 'girlfriend' => 'Unknown '), Array ('id' => 9, 'name' => 'id', 'age' => 71, 'girlfriend' => 'widow '), ); $ Ids = array_column ($ data, 'id '); // Out: array (1, 4, 9 ); $ Info = array_column ($ data, 'name', 'girlfriend '); // Out: array ('dubox' => 'soda Green', 'Little Chung' => 'Don't know ', 'id' => 'widow '); $ Cache = array_column ($ data, 'id', 'name, age, Girlfriend '); // Out: array ( 1 => array ('name' => 'dubox', 'age' => 25, 'girlfriend' => 'soda green '), 4 => array ('name' => 'Spring sub', 'age' => 21, 'girlfriend' => 'Unknown '), 9 => array ('name' => 'id', 'age' => 71, 'girlfriend' => 'widow '), );