[英]How do I pass multiple images uploaded through a JS function and then submitted with the form?
我正在嘗試讓用戶上傳的多個圖像通過一個函數傳遞,然后通過表單提交進行處理。 我采用以下形式接收用戶上傳文件:
<form id="formUploadFile" action="<?php echo $uploadHandler ?>"
enctype="multipart/form-data" method="post" >
<p>
<input type="hidden" name="MAX_FILE_SIZE" value="<?php echo $max_file_size ?>">
</p>
<p align="center">
<label for="file" >First, Choose up to 20 images!</label>
<input type="file" name="files[]" multiple />
</p>
</p>
<p class="text-center">
<h5>Then, Choose your Difficulty!</h5>
<div class="btn-group">n>
<button type="button" class="btn btn-success" value="Novice" onclick="changeDifficulty(1)">Novice</button>
<button type="button" class="btn btn-success" value="Intermediate" onclick="changeDifficulty(2)">Intermediate</button>
</div>
</p>
</form>
然后,我具有以下功能,可以選擇難度,顯示一個加載圓圈,然后應提交包含多個圖像的表格:
<script>
function changeDifficulty(number){
var difficulty = document.getElementById('hiddDiff');
var form = getElementById('formUploadFile');
difficulty.value = number;
document.getElementById('hide-div').style.display='none';
document.getElementById('hide-div2').style.display='none';
document.getElementById('loadingScreen').style.display='block';
form.submit();
}
但是,圖像文件不是使用表單提交的……如果我刪除該行中的“ multiple”語句,則此代碼將成功傳遞一個圖像。 任何幫助表示贊賞。
我不確定您的問題在哪里,但是我已經對此進行了自我測試,並且可以很好地處理多個文件:
<!DOCTYPE HTML>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Test</title>
<script type="text/javascript">
var time = 0;
var form;
// Make sure the DOM is loaded
document.addEventListener("DOMContentLoaded", function(event) {
// Add event listener to the form submit
document.getElementById("formUploadFile").addEventListener("submit", function(e) {
// Display the loading image
document.getElementById('loadImg').style.display='block';
// Prevent the form submit unless time is equal to 3
form = function(){
// Time is equal to 3, so submit the form
if(time === 3){
document.getElementById("formUploadFile").submit();
} else {
// Repeat the form function every second and increase time by 1 on each loop
setTimeout(form, 1000);
time++;
e.preventDefault();
}
}
form();
});
});
</script>
</head>
<body>
<img id="loadImg" src="load.gif" style="display:none;">
<form id="formUploadFile" name="upload" action="upload.php" method="POST" enctype="multipart/form-data">
Select images to upload: <input type="file" name="image[]" multiple>
<input type="submit" name="upload" value="upload">
</form>
</body>
</html>
我已經在代碼中添加了注釋,以解釋發生了什么。
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