首页 > 代码库 > http_build_query函数(学习)

http_build_query函数(学习)

http_build_query函数

 

http_build_query 

-- 生成 url-encoded 之后的请求字符串

描述

string http_build_query ( array formdata [, string numeric_prefix])
 
 
根据数组产生一个urlencode之后的请求字符串,如果在基础数组中使用了数字下标同时给出了 numeric_prefix 参数。
<?php
$data
= array(‘foo‘=>‘bar‘,
              
‘baz‘=>‘boom‘,
              
‘cow‘=>‘milk‘,
              
‘php‘=>‘hypertext processor‘);
              
echo
http_build_query($data);
输出:
      foo=bar&baz=boom&cow=milk&php=hypertext+processor
?> 
 
<?php
$data
= array(‘foo‘, ‘bar‘, ‘baz‘, ‘boom‘, ‘cow‘ =>‘milk‘,‘php‘ =>‘hypertext processor‘);
              
echo
http_build_query($data);
输出:
      0=foo&1=bar&2=baz&3=boom&cow=milk&php=hypertext+processor


echo http_build_query($data, ‘myvar_‘);

       myvar_0=foo&myvar_1=bar&myvar_2=baz&myvar_3=boom&cow=milk&php=hypertext+processor

?> 
 
<?php
$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‘);
                                               
echo
http_build_query($data, ‘flags_‘);
 输出:(为了可读性对其进行了折行)
      user[name]=Bob+Smith&user[age]=47&user[sex]=M&user[dob]=5%1F12%1F1956&
       pastimes[0]=golf&pastimes[1]=opera&pastimes[2]=poker&pastimes[3]=rap&
       children[bobby][age]=12&children[bobby][sex]=M&children[sally][age]=8&
       children[sally][sex]=F&flags_0=CEO

   注意:只有基础数组中的数字下标元素“CEO”才获取了前缀,其它数字下标元素(如
   pastimes 下的元素)则不需要为了合法的变量名而加上前缀。

?>  
 
<?php
class myClass{
   var
$foo;
   var
$baz;
  
   function
myClass() {
    
$this->foo = ‘bar‘;
    
$this->baz = ‘boom‘;
   }
}

$data = new myClass();

echo
http_build_query($data);
 输出:
      foo=bar&baz=boom

?>