將url字串的參數轉為array

1. 取出query部份
   

   $url = 'http://username:password@hostname/path?arg=value#anchor';
   $urlinfo = parse_url($url);
   ------------------------
   Array
   (
       [scheme] => http
       [host] => hostname
       [user] => username
       [pass] => password
       [path] => /path
       [query] => arg=value
       [fragment] => anchor
   )

2. 轉成array
   

   $str = "first=value&arr[]=foo+bar&arr[]=baz";
   parse_str($str);
   echo $first;  // value
   echo $arr[0]; // foo bar
   echo $arr[1]; // baz
   
   parse_str($str, $output);
   echo $output['first'];  // value
   echo $output['arr'][0]; // foo bar
   echo $output['arr'][1]; // baz

References

• parse_url
• parse_str