使用ajax發(fā)送數(shù)據(jù)后如何將它們存儲(chǔ)在PHP變量中？我創(chuàng)建了一個(gè)轉(zhuǎn)儲(chǔ)文件，我可以在其中看到該變量已發(fā)送，但是當(dāng)我回顯它們時(shí)卻看不到它們？我怎么能看到他們？我通過(guò) URL 發(fā)送獲取數(shù)據(jù)并通過(guò)XMLHttpRequest(); 數(shù)據(jù)發(fā)布數(shù)據(jù)返回很好但是為什么它不存儲(chǔ)在 PHP 變量中？<?php//dumping code to see received data$output = "Post Variables\n";$output .= print_r($_POST, true);$output .= "\nGet Variables\n";$output .= print_r($_GET, true);$output .= "\nBody Content\n";$output .= print_r(file_get_contents('php://input') ?: "empty", true);file_put_contents("dump.txt", $output);// Endif(isset($_GET['a'])) { die('This is post data: ' . htmlspecialchars($_GET['a'])); } if(isset($_POST['b'])) { die('This is post data: ' . htmlspecialchars($_POST['b'])); } echo "This is get variable: " .$a; echo "This is post variable: " .$b;?><html><head><script>//sending ajax request to change table name on onclick eventfunction clickMe(j){ // Create our XMLHttpRequest object var req = new XMLHttpRequest(); // Create some variables we need to send to our PHP file var dayName = document.getElementById("btn"+j).value; var SVAR = "b="+dayName; var url = "tempo.php?a="+dayName; req.open("POST", url, true); // Set content type header information for sending url encoded variables in the request req.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); // Access the onreadystatechange event for the XMLHttpRequest object req.onreadystatechange = function() { if(req.readyState == 4 && req.status == 200) { let data_return = req.responseText; document.getElementById("status1").innerHTML = data_return; } } // Send the data to PHP now... and wait for response to update the status div req.send(SVAR); }</script></head><body><h2>Ajax Post to PHP and Get Return Data</h2><button id="btn1" value="saturday" onclick="clickMe(1)">btn1</button><button id="btn2" value="sunday" onclick="clickMe(2)">btn2</button><br><br><div id="status1"></div></body></html>
2 回答
紅糖糍粑
TA貢獻(xiàn)1815條經(jīng)驗(yàn) 獲得超6個(gè)贊
你使用 XMLHttpRequest 的方式不對(duì)。您應(yīng)該使用 2 個(gè)不同的頁(yè)面：調(diào)用者 (index.php) 和異步腳本 (tempo.php) 更正您當(dāng)前的調(diào)用者頁(yè)面： index.php ： ? 使用不帶任何參數(shù)的 url：
url="tempo.php"
? 一起發(fā)送您的兩個(gè)參數(shù)：
req.send("a="+dayName+"&b="+dayName);要調(diào)試異步頁(yè)面：tempo.php，只需在 tempo.php 頂部添加一個(gè)偽造的 get_parameter：
a = a_possible_value_for_a
然后直接在瀏覽器中調(diào)用 tempo.php（沒(méi)有你的 ajax 頁(yè)面）
30秒到達(dá)戰(zhàn)場(chǎng)
TA貢獻(xiàn)1828條經(jīng)驗(yàn) 獲得超6個(gè)贊
從 HTML 文件發(fā)送的請(qǐng)求。
發(fā)送過(guò)程一：
$(document).on("click","#btn1",function(){
var data = $(this).val();
/* ajax request sent start */
$.ajax({
method:"post",
url:"phpFileName.php",
data:{backendPostName:data},
dataType:"json",
success:function(response){
/* Logic implemented here */
}
});
/* ajax request sent end*/
});
根據(jù)你的html結(jié)構(gòu)發(fā)送過(guò)程二：
function clickMe(data){
var data = $(this).val();
/* ajax request sent start */
$.ajax({
method:"post",
url:"phpFileName.php",
data:{backendPostName:data},
dataType:"json",
success:function(response) {
/* Logic Implementation here */
}
});
/* ajax request sent end*/
}
當(dāng)您想在 php 文件中接收此發(fā)送數(shù)據(jù)時(shí)。
首先通過(guò)php“isset()”函數(shù)檢查是否找到這個(gè)名字
下面的例子：
php 文件：
<?php
if(isset($_POST['backendPostName'])){
$customName = $_POST['backendPostName'];
/*
store or other logic implement here .
if you wants to echo html then echo "success"; or your choice
if you wants to return json data then return json_encode(["result"=>1]);
*/
/* For HTML Return */
echo "<h1>Success</h1";
/*For Json return */
echo json_encode(["result"=>1]);
}
?>
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