http_build_query 比较好用的字符串函数

<?php
/*
* http_build_query 
* 是一个字符串操作函数
*针对的是数组和对象生成 URL-encode 之后的请求字符串
*
*/

$arr = array("121212"=>"woman","56856"=>"men");
class jclass{
public $a=123;
private $b=323;
protected $c = 897;
}

$str = http_build_query($arr);//string(22)"121212=woman&56856=men"

var_dump($str);
echo"<br>";
$jclass = new jclass();
$jclass = json_encode($jclass);//string(9)"{"a":123}"
var_dump($jclass);

echo"<br>";
echo http_build_query($arr,&#39;&#39;,"_kkkkk");
echo"<br>";
var_dump(http_build_query($arr,"kkk_"));
echo"<br>";



$data = array(&#39;user&#39;=>array(&#39;name&#39;=>&#39;Bob Smith&#39;,
&#39;age&#39;=>47,
&#39;sex&#39;=>&#39;M&#39;,
&#39;dob&#39;=>&#39;5/12/1956&#39;),
 &#39;pastimes&#39;=>array(&#39;golf&#39;, &#39;opera&#39;, &#39;poker&#39;, &#39;rap&#39;),
&#39;children&#39;=>array(&#39;bobby&#39;=>array(&#39;age&#39;=>12,
&#39;sex&#39;=>&#39;M&#39;),
&#39;sally&#39;=>array(&#39;age&#39;=>8,
&#39;sex&#39;=>&#39;F&#39;)),
&#39;CEO&#39;);

echo http_build_query($data, &#39;flags_&#39;); echo"<br>";

// http://dev.blogs/string/http_build_query.php?user[name]=Bob+Smith&user[age]=47&user[sex]=M&user[dob]=5%2F12%2F1956&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
$get_arr = $_GET;
print_r($get_arr); echo"<br>";//呵呵，过来的已经是数组了
$cval ="something from somewhere";
setcookie("test_cookie", $cval, time() + 60 * 60 * 24);
var_dump($_COOKIE);echo &#39;<br>&#39;;
//var_dump(http_build_cookie($_COOKIE));//报错，是因为 pecl_http 扩展是没有默认安装的，要先去安装扩展 php_http.dll