<?php  
//parse_str與http_build_query的使用  
  
//使用parse_str將url字符串轉變為key=>value的數組  
$str = "tn=monline_dg&ie=utf-8&bs=httpbuildurl&f=3&rsv_bp=1&wd=php+buildquery&rsv_sug3=17&rsv_sug4=330&rsv_sug1=16&oq=php+build&rsv_sug2=0&rsp=0&inputT=8922";  
parse_str
 
($str,$arr);  
var_export($arr);  
  
/* 
輸出： 
array ( 
  ‘tn‘ => ‘monline_dg‘, 
  ‘ie‘ => ‘utf-8‘, 
  ‘bs‘ => ‘httpbuildurl‘, 
  ‘f‘ => ‘3‘, 
  ‘rsv_bp‘ => ‘1‘, 
  ‘wd‘ => ‘php buildquery‘, 
  ‘rsv_sug3‘ => ‘17‘, 
  ‘rsv_sug4‘ => ‘330‘, 
  ‘rsv_sug1‘ => ‘16‘, 
  ‘oq‘ => ‘php build‘, 
  ‘rsv_sug2‘ => ‘0‘, 
  ‘rsp‘ => ‘0‘, 
  ‘inputT‘ => ‘8922‘, 
) 
 
*/  
  
//使用http_build_query將key=>value的數組轉變為url字符串  
$url = http_build_query($arr);  
echo($url);  
  
//輸出：tn=monline_dg&ie=utf-8&bs=httpbuildurl&f=3&rsv_bp=1&wd=php+buildquery&rsv_sug3=17&rsv_sug4=330&rsv_sug1=16&oq=php+build&rsv_sug2=0&rsp=0&inputT=8922  
 

  
?>  

簡單來說，http_build_query()就是將一個數組轉換成url 問號?後面的參數字符串，並且會自動進行urlencode處理。

PHP使用http_build_query()構造URL字符串的方法(可將POST參數組轉換拼接成GET請求鏈接)