PHP 读取Postgresql中的数组

function getarray_postgresql($arraystr)
 {
     $regx1 = '/^{(.*)}$/';
     $regx2 = "/\"((\\\\\\\\|\\\\\"|[^\"])+)\"|[^,]+/";
     $regx3 = '/^[^"].*$|^"(.*)"$/';
     $match = null;
     preg_match( $regx1,$arraystr,$match);
     $str = $match[1];
     preg_match_all($regx2, $str,$match);
     $items = $match[0];
     $array = array();
     $count = count($items);
     for($index = 0; $index < $count;++$index)
     {
         preg_match($regx3, $items[$index],$match);
         $array[$index]=end($match);
     }
     return $array;
 }