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
?> 

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本文链接地址: Url-encode请求字符串的利器http_build_query函数 http://www.chhua.com/web-note4729

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