php 常见问题及解决方法

(1)请求要素是json字符串,后台如何获取

//this is a common php library by huangwei ,

//date:2014-07-03

//see http://blog.sina.com.cn/s/blog_4657e98e0100dyxp.html

//see http://www.cnblogs.com/fullhouse/archive/2012/04/24/2468870.html

if(array_key_exists('HTTP_RAW_POST_DATA',$GLOBALS)){//判断是否有key-HTTP_RAW_POST_DATA

$raw_data=$GLOBALS['HTTP_RAW_POST_DATA'];//always_populate_raw_post_data = On

}

if (empty($raw_data)) {

$raw_data=$_POST;

}

if (empty($raw_data)) {

//echo "raw_data is empty";

$raw_data=file_get_contents("php://input");

}

if(empty($raw_data)) {

$raw_data=$_GET;

}

if(empty($raw_data)) {

$raw_data=$_POST;

}

(2)如何把接收到的json字符串转化为对象

$post_object = json_decode($raw_data);

(3)如何把json对象转化为数组

//convert object to array

function object_to_array($obj){

if(is_array($obj)){

return $obj;

}

$_arr = is_object($obj)? get_object_vars($obj) :$obj;

foreach ($_arr as $key => $val){

$val=(is_array($val)) || is_object($val) ? object_to_array($val) :$val;

$arr[$key] = $val;

}

return $arr;

}

(4)获取php服务器操作系统类型

/***

* @return string : windows or linux

*/

function serverOS(){

$os_name=strtolower(php_uname('s'));

$os_pos=strpos($os_name,'linux');

if($os_pos === false) {

return "windows";

}

else {

return "linux";

}

}

应用:

$root_path_index;

//echo serverOS();

if(serverOS()=='linux'){

$root_path_index=-9;

}else{

$root_path_index=32;

}

$config['webroot']=substr(dirname(__FILE__), 0, $root_path_index);///var/www/html/exchange

(5)字符串a是否包含字符串b

function strexists($a, $b)

{

return !(strpos($a, $b) === FALSE);

}

(6)递归创建文件夹

function mkdirs($dir)

{

return is_dir($dir) or (mkdirs(dirname($dir)) and mkdir($dir, 0777));

}

php学习网站

​