php處理url函式

• 組url字串
  利用http_build_query

  <?php
  $data = array('foo'=>'bar',
                'baz'=>'boom',
                'cow'=>'milk',
                'php'=>'hypertext processor');
  
  echo http_build_query($data) . "\n";
  echo http_build_query($data, '', '&');
  
  //前置詞
  $data = array('foo', 'bar', 'baz', 'boom', 'cow' => 'milk', 'php' =>'hypertext processor');
  echo http_build_query($data, 'myvar_');  
  --
  foo=bar&baz=boom&cow=milk&php=hypertext+processor
  foo=bar&baz=boom&cow=milk&php=hypertext+processor
  myvar_0=foo&myvar_1=bar&myvar_2=baz&myvar_3=boom&cow=milk&php=hypertext+processor
  

• 解url字串
  利用parse_str

  <?php
  $str = "first=value&arr[]=foo+bar&arr[]=baz";
  parse_str($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