如何使用jQuery ajax和PHP上传文件(无需点击任何提交按钮) [英] How to upload file using jquery ajax and php (without clicking any submit button)
问题描述
我有这样的表格:
< form method =postclass =form_cnvc>
< p>< input type =textname =f_nmvalue =placeholder =输入您的名字>< / p>
< p>< input type =textname =l_nmvalue =placeholder =输入您的姓氏>< / p>
< div class =dropfile visible-lg>
< input type =fileid =image_file_inputname =image_file_input>
< span>选择图片(.jpg,.png,.bmp文件)< / span>
< / div>
< p class =submit>< input type =submitname =submitvalue =post>< / p>
< / form>
我希望当用户选择一个图像时,它会自动提交到我的PHP页面我可以将它保存在数据库中,并返回一个insert_id与图片的缩略图。
我想用jQuery来做,但不能这样做。 PHP的代码是:
输入Element,然后在里面做一个ajax-request:
$ $ $ $ $ $image_file_input> change(function(){
$ .ajax({
url:my-target-url.php,
type:post,
dataType:'json',
processData:false ,
contentType:false,
data:{file:$(#image_file_input)。val()},
成功:函数(text){
if(text = =成功){
alert(您的图片上传成功);
}
},
错误:function(){
警报(发生错误,请重试。);
}
});
});
创建一个url或路由并在url:tag(domain / file.php)处输入代码服务器的东西:
pre code $ function $ process
foreach($ _文件作为$文件){
//做任何你想要的文件,保存在数据库或东西...
// $ file [name];
// $ file [tmp_name];
//在这里插入bla blubb
echosuccess;
}
}
die();
}
I have a form like this:
<form method="post" class="form_cnvc">
<p><input type="text" name="f_nm" value="" placeholder="type your first name"></p>
<p><input type="text" name="l_nm" value="" placeholder="type your last name"></p>
<div class="dropfile visible-lg">
<input type="file" id="image_file_input" name="image_file_input">
<span>Select Images(.jpg , .png, .bmp files) </span>
</div>
<p class="submit"><input type="submit" name="submit" value="post"></p>
</form>
I want that when the user will selects an image, it would be automatically submitted to my PHP page so that I can save it in the database and return an insert_id with the thumbnail of the picture.
I want to do it using jQuery but not able to do so.
PHP code is:
Easy, use a change trigger on your input Element and do an ajax-request inside:
$("#image_file_input").change(function() {
$.ajax({
url: "my-target-url.php",
type: "post",
dataType: 'json',
processData: false,
contentType: false,
data: {file: $("#image_file_input").val()},
success: function(text) {
if(text == "success") {
alert("Your image was uploaded successfully");
}
},
error: function() {
alert("An error occured, please try again.");
}
});
});
Create a url or route and enter it at url: tag (domain/file.php) and then code serversided stuff:
function processFileUpload() {
if(count($_FILES) > 0) {
foreach($_FILES as $file) {
//DO whatever you want with your file, save it in the db or stuff...
//$file["name"];
//$file["tmp_name"];
//Insert here bla blubb
echo "success";
}
}
die();
}
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