How html interacts with php data-PHP Problem-php.cn

How html interacts with php data

Data interaction between php files and HTML pages

HTML sending (sent using POST)

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    dog
 cat

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Note: Key operations

var request = new XMLHttpRequest(); request.open("POST", "servertest.php"); var q = "data=" + writeArray;// 生成信息体q = “name “+ value request.setRequestHeader("Content-type","application/x-www-form-urlencoded"); request.send(q); //HTML页面POST发送内容后，php通过超全局变量 $_GET 和 $_POST收集

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php receives (collected using super-global variables $_GET and $_POST)


        
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Note: Key operations

searchWrite=searchWrite=_POST["data"]；

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Use super-global variables $ _POST collects the value corresponding to the name and puts it into $searchWrite, so the data sent by the HTML page is obtained, which can be used

HTML page to obtain the php variables through json

php Send (return data pairs in json format through echo)


        
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Note: Key operations

$result = '{"success":true,"defaultSearch":"'.$defaultSearch.'"}';//将待返回内容改为json格式 echo $result;//HTML页面的json部分将从echo的输出获取json格式化数据对，因此echo输出内容需要为json格式

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HTML receive (receive data pairs in json format returned by php echo through GET)

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Key operations:

$.ajax({ 　　 type: "GET", url: "default_search.php?data=" + "searchArray", dataType: "json", success: function(data) { 　　 If(data.success){alert(data.defaultSearch);} //data为php使用echo输出的json格式的数据对,通过data.name的形式即可以使用name对应的value }, error: function(jqXHR){ 　　alert("发生错误：" + jqXHR.status); }, }); });

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