[英]Calling a php function and redirecting on button click
我有一个php函数,其中正在创建一些pdf。 我有一个按钮,我想在按钮单击时调用该函数,然后重定向到URL。 最简单的方法是什么?
如果您需要调用PHP方法,则可以使用AJAX。 像这样:
var btn = document.getElementById("button_id");
btn.onclick = function () {
// Make AJAX request
// On success, do this:
window.location.href = "url to redirect to";
};
可以轻松地搜索“发出AJAX请求”的代码,我将在一分钟内提供它:)
更新:
function ajaxFunction() {
var ajaxRequest; // The variable that makes Ajax possible!
try {
// Firefox, Chrome, Opera 8.0+, Safari
ajaxRequest = new XMLHttpRequest();
} catch (e) {
// Internet Explorer Browsers
try {
ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {
try {
ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP.6.0");
} catch (e) {
try {
ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP.3.0");
} catch (e) {
throw new Error("This browser does not support XMLHttpRequest.");
}
}
}
}
}
return ajaxRequest;
}
AJAX代码-
var req = ajaxFunction();
req.onreadystatechange = function (response) {
if (response.status == 200 && response.readyState == 4) {
window.location.href = "url to redirect to";
}
}
req.open("POST", "your PHP file's URL", true);
req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
req.send(null); // Or send any `key=value&` pairs as a string
有多种方法可以实现此目的。 我会在ajax中调用PHP函数,并根据函数的返回值进行重定向。 以下示例使用jQuery:
jQuery的:
$.ajax({
url: 'createpdf.php',
success: function(data) {
if (data) window.location = 'link/to/new/path';
}
});
PHP:
function create_pdf(){
//Create PDF
//If PDF was created successfully, return true
return true;
}
<form name="input" action="whatever.php" method="get">
...
<input type="submit" value="Submit">
</form>
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