php http_build_query() 将数组生成URL查询字符串

使用一维数组

$data = array(
	\'foo\'=>\'bar\', 
	\'baz\'=>\'boom\', 
	\'site\'=>\'www.nowamagic.net\', 
	\'name\'=>\'nowa magic\'); 
	
echo http_build_query($data); 

/* output 
	foo=bar&baz=boom&cow=milk&php=hypertext+processor 
*/ 

如果是索引数组与关联数组混合而成的数组又如何呢？

$data = array(
	\'foo\',
	\'bar\', 
	\'site\'=>\'www.xxxx.com\', 
	\'name\'=>\'manongjc\'); 
	
echo http_build_query($data); 

/* output 
	0=foo&1=bar&site=www.xxx.com&name=manongjc
*/ 

它会自动添加数字索引。

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http_build_query 还有一个参数，可以给数字索引加前缀，我们再试试：

$data = array(
	\'foo\',
	\'bar\', 
	\'site\'=>\'www.xxx.com\', 
	\'name\'=>\'manongjc\'); 
	
echo http_build_query($data, \"nm_\"); 

/* output 
	nm_0=foo&nm_1=bar&site=www.xxx.com&name=manongjc
*/ 

再复杂一些的数组又如何呢？比如二维数组什么的。

$data = array(
	\'user\'=>array(	\'name\'=>\'Bob Smith\', 
					\'age\'=>47, 
					\'sex\'=>\'M\', 
					\'dob\'=>\'5/12/1956\'), 
	  \'pastimes\'=>array(\'golf\', \'opera\', \'poker\', \'rap\'), 
	  \'children\'=>array(\'bobby\'=>array(\'age\'=>12, 
									   \'sex\'=>\'M\'), 
						\'sally\'=>array(\'age\'=>8, 
									   \'sex\'=>\'F\')), 
	  \'CEO\'); 

结果：

user%5Bname%5D=Bob+Smith&user%5Bage%5D=47&user%5Bsex%5D=M&user%5Bdob%5D=5%2F12%2F1956
&pastimes%5B0%5D=golf&pastimes%5B1%5D=opera&pastimes%5B2%5D=poker
&pastimes%5B3%5D=rap&children%5Bbobby%5D%5Bage%5D=12&children%5Bbobby%5D%5Bsex%5D=M
&children%5Bsally%5D%5Bage%5D=8&children%5Bsally%5D%5Bsex%5D=F&0=CEO