將二維數組按鍵值相同的重組數組

數組(    [0] => 數組🎜🎜[0] => 數組🎜🎜        (            🜠       [name] => 上海        )     [1]     🎜[1] =>;        (            🜠       [name] => 江蘇        )     [2] =    🎜[2] =>;        (            🜠      [name] => 上海        )     [31]     🎜[3] =>;        (            🜠      [name] => 江蘇        )     [4]     🎜[4] =>;        (            🜠      [name] => 浙江        ) )依，Artitlek為：)依titledArtitle為：(    [0] => 陣列               [title] => 111            [name] => 上海,杭州        )     [1]     🎜[1] =>;        (            [title] => dd            ) )

實現代碼：

function array_group_concat($ar, $field, $group_by) {

  $res = array();
  foreach($ar as $row) {
    $g = $row[$group_by];
    if(isset($res[$g])) $res[$g][$f