本文目录一览：
- 1、PHP跨域获取json数据的方法，PHP里面有没有类似ajax的函数？
- 2、jsonp跨域请求范例，求PHP版本的jsonp范例。
- 3、php怎么配合$getjson跨域callback=
- 4、thinkphp 跨域获取 xml 转 json
- 5、PHP如何实现跨域传递参数
PHP跨域获取json数据的方法，PHP里面有没有类似ajax的函数？
php中的文件读写函数基本上都可直接支持url，也就是说你可以像操作本地文件一样直接操作其他网站的文件（当然只是读取，写入是不可能的），而且没有任何跨域限制，比如下面一行代码就可直接读取百度首页的html代码：
$bd=file_get_contents("");
如果想获取json数据，只需把网址换一下即可。当然，还需要做一下格式转换，php本身就有专门的json转换函数：
$json=json_decode(file_get_contents("网址"),true);
这样一看，是不是比前端的ajax还要简单百倍？！
jsonp跨域请求范例，求PHP版本的jsonp范例。
jquery代码:
$.getJSON(";callback=?",{id: 10, name: "test"}, function(data){
alert(data.msg);
});
服务端返回：
jsonp1310628945031({"rs":true,"msg":"u60a8u7684u4fe1u606fu63d0u4ea4u6210u529fuff01"})
PHP代码：
$result['rs'] = false;
$result['msg'] = '您的信息提交成功！';
$json = new Services_JSON();
header('Content-Type: application/json');
echo $_GET['callback'].'('.$json-encode($result).')';
php怎么配合$getjson跨域callback=
type : "post",
url : "ajax.php",
dataType : "jsonp",
jsonp: "callback",//传递给请求处理程序或页面的，用以获得jsonp回调函数名的参数名(默认为:callback)
jsonpCallback:"success_jsonpCallback",//自定义的jsonp回调函数名称，默认为jQuery自动生成的随机函数名
success : function(json){
alert('success');
},
error:function(){
alert('fail');
}
thinkphp 跨域获取 xml 转 json
最简单的转换：
function simplest_xml_to_array($xmlstring) {
return json_decode(json_encode((array) simplexml_load_string($xmlstring)), true);
}
完整点的：
function xml2array($contents, $get_attributes=1, $priority = 'tag') {
if(!$contents) return array();
if(!function_exists('xml_parser_create')) {
//print "'xml_parser_create()' function not found!";
return array();
}
//Get the XML parser of PHP - PHP must have this module for the parser to work
$parser = xml_parser_create('');
xml_parser_set_option($parser, XML_OPTION_TARGET_ENCODING, "UTF-8"); #
xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0);
xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1);
xml_parse_into_struct($parser, trim($contents), $xml_values);
xml_parser_free($parser);
if(!$xml_values) return;//Hmm...
//Initializations
$xml_array = array();
$parents = array();
$opened_tags = array();
$arr = array();
$current = $xml_array; //Refference
//Go through the tags.
$repeated_tag_index = array();//Multiple tags with same name will be turned into an array
foreach($xml_values as $data) {
unset($attributes,$value);//Remove existing values, or there will be trouble
//This command will extract these variables into the foreach scope
// tag(string), type(string), level(int), attributes(array).
extract($data);//We could use the array by itself, but this cooler.
$result = array();
$attributes_data = array();
if(isset($value)) {
if($priority == 'tag') $result = $value;
else $result['value'] = $value; //Put the value in a assoc array if we are in the 'Attribute' mode
}
//Set the attributes too.
if(isset($attributes) and $get_attributes) {
foreach($attributes as $attr = $val) {
if($priority == 'tag') $attributes_data[$attr] = $val;
else $result['attr'][$attr] = $val; //Set all the attributes in a array called 'attr'
}
}
//See tag status and do the needed.
if($type == "open") {//The starting of the tag 'tag'
$parent[$level-1] = $current;
if(!is_array($current) or (!in_array($tag, array_keys($current)))) { //Insert New tag
$current[$tag] = $result;
if($attributes_data) $current[$tag. '_attr'] = $attributes_data;
$repeated_tag_index[$tag.'_'.$level] = 1;
$current = $current[$tag];
} else { //There was another element with the same tag name
if(isset($current[$tag][0])) {//If there is a 0th element it is already an array
$current[$tag][$repeated_tag_index[$tag.'_'.$level]] = $result;
$repeated_tag_index[$tag.'_'.$level]++;
} else {//This section will make the value an array if multiple tags with the same name appear together
$current[$tag] = array($current[$tag],$result);//This will combine the existing item and the new item together to make an array
$repeated_tag_index[$tag.'_'.$level] = 2;
if(isset($current[$tag.'_attr'])) { //The attribute of the last(0th) tag must be moved as well
$current[$tag]['0_attr'] = $current[$tag.'_attr'];
unset($current[$tag.'_attr']);
}
}
$last_item_index = $repeated_tag_index[$tag.'_'.$level]-1;
$current = $current[$tag][$last_item_index];
}
} elseif($type == "complete") { //Tags that ends in 1 line 'tag /'
//See if the key is already taken.
if(!isset($current[$tag])) { //New Key
$current[$tag] = $result;
$repeated_tag_index[$tag.'_'.$level] = 1;
if($priority == 'tag' and $attributes_data) $current[$tag. '_attr'] = $attributes_data;
} else { //If taken, put all things inside a list(array)
if(isset($current[$tag][0]) and is_array($current[$tag])) {//If it is already an array...
// ...push the new element into that array.
$current[$tag][$repeated_tag_index[$tag.'_'.$level]] = $result;
if($priority == 'tag' and $get_attributes and $attributes_data) {
$current[$tag][$repeated_tag_index[$tag.'_'.$level] . '_attr'] = $attributes_data;
}
$repeated_tag_index[$tag.'_'.$level]++;
} else { //If it is not an array...
$current[$tag] = array($current[$tag],$result); //...Make it an array using using the existing value and the new value
$repeated_tag_index[$tag.'_'.$level] = 1;
if($priority == 'tag' and $get_attributes) {
if(isset($current[$tag.'_attr'])) { //The attribute of the last(0th) tag must be moved as well
$current[$tag]['0_attr'] = $current[$tag.'_attr'];
unset($current[$tag.'_attr']);
}
if($attributes_data) {
$current[$tag][$repeated_tag_index[$tag.'_'.$level] . '_attr'] = $attributes_data;
}
}
$repeated_tag_index[$tag.'_'.$level]++; //0 and 1 index is already taken
}
}
} elseif($type == 'close') { //End of tag '/tag'
$current = $parent[$level-1];
}
}
return($xml_array);
}
?
函数描述及例子
$arr = xml2array(file_get_contents("tools.xml"),1,'attribute');
PHP如何实现跨域传递参数
通常是用json，你可以用php的函数json_encode(),转换为json格式，然后输出进行传递
