[英]Insert record into database using javascript, mysql, and php
我有以下js函数,该函数发出ajax请求,但由于某种原因未这样做。 我检查了警报URL,它按预期显示它,因此声明了所有变量。
var request = new XMLHttpRequest();
var url = "ajax_js/q_ajax.php?q="+ques+
"&ans="+ans+
"&a="+inp[0].value+
"&b="+inp[2].value+
"&c="+inp[4].value+
"&d="+inp[6].value+
"&cor="+checked+
"&def="+input+
"&q_n="+q_name+
"&c_id="+c_id;
request.onreadystatechange=function (){
if(request.readyState==4 && request.status==200){
alert(request.responseText);
}
request.open("GET", url, true);
request.send();
}
这是来自php文件的代码。
<?php
require("db_conx.php");
$q = $_GET['q'];
$ans = $_GET['ans'];
$a = $_GET['a'];
$b = $_GET['b'];
$c = $_GET['c'];
$d = $_GET['d'];
$cor = $_GET['cor'];
$def = $_GET['def'];
$q_n = $_GET['q_n'];
$c_id = $_GET['c_id'];
$q = mysqli_escape_string($con, $q);
$ans = mysqli_escape_string($con, $ans);
$a = mysqli_escape_string($con, $a);
$b = mysqli_escape_string($con, $b);
$c = mysqli_escape_string($con, $c);
$d = mysqli_escape_string($con, $d);
$cor = mysqli_escape_string($con, $cor);
$def = mysqli_escape_string($con, $def);
$q_n = mysqli_escape_string($con, $q_n);
$c_id = mysqli_escape_string($con, $c_id);
/* Modify id for the system */
$query = mysqli_query($con, "INSERT INTO course_quiz (course_id, quiz_name, question, des_answer, ChoiceA,
ChoiceB, ChoiceC, ChoiceD, correct, def)
VALUES ('$c_id', '$q_n', '$q', '$ans', '$a', '$b', '$c', '$d', '$cor', '$def')");
echo('Question has been saved');
/* header('Location: ../instr_home.php'); */
我在同一页面中还有另一个ajax调用(工作完美),我认为是问题的原因。 XMLHttpRequest的变量也被命名为different。
先感谢您!
刚用aquery替换了ajax,
在通过url之前,请确保所有URL变量都已初始化。
在PHP文件中,将$ _GET方法更改为$ _POST。
只需复制粘贴解决方案。
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script type="text/javascript">
function ajax()
{
var urlString ="q="+ques+"&ans="+ans+"&a="+inp[0].value+"&b="+inp[2].value+"&c="+inp[4].value+"&d="+inp[6].value+"&cor="+checked+"&def="+input+"&q_n="+q_name+"&c_id="+c_id;
$.ajax
({
url: "ajax_js/q_ajax.php",
type : "POST",
cache : false,
data : urlString,
success: function(response)
{
alert(response);
}
});
}
</script>
在您的PHP文件中,
<?php
require("db_conx.php");
$q = $_POST['q'];
$ans = $_POST['ans'];
$a = $_POST['a'];
$b = $_POST['b'];
$c = $_POST['c'];
$d = $_POST['d'];
$cor = $_POST['cor'];
$def = $_POST['def'];
$q_n = $_POST['q_n'];
$c_id = $_POST['c_id'];
$q = mysqli_escape_string($con, $q);
$ans = mysqli_escape_string($con, $ans);
$a = mysqli_escape_string($con, $a);
$b = mysqli_escape_string($con, $b);
$c = mysqli_escape_string($con, $c);
$d = mysqli_escape_string($con, $d);
$cor = mysqli_escape_string($con, $cor);
$def = mysqli_escape_string($con, $def);
$q_n = mysqli_escape_string($con, $q_n);
$c_id = mysqli_escape_string($con, $c_id);
/* Modify id for the system */
$query = mysqli_query($con, "INSERT INTO course_quiz (course_id, quiz_name, question, des_answer, ChoiceA,
ChoiceB, ChoiceC, ChoiceD, correct, def)
VALUES ('$c_id', '$q_n', '$q', '$ans', '$a', '$b', '$c', '$d', '$cor', '$def')");
echo('Question has been saved');
/* header('Location: ../instr_home.php'); */
?>
以此更改您的代码,您会发现错误
request.onreadystatechange=function (){ //if(request.readyState==4 && request.status==200){ alert(request.responseText); //} } request.open("GET", url, false); request.send();
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