我想允许用户上传仅pdf
文件有两种输入文件:超过一个上传检查的文件扩展名复选框
<form onsubmit='return checkExt()' action='upload.php' method='POST'>
<label>upload the first file</label>
<input type='file' name='fileToUpload' id='fileToUpload' required>
<label>upload the secondfile</label>
<input type='file' name='fileToUpload1' id='fileToUpload1' required>
</form>
我用下面的脚本来检查的扩展名的文件,TO-上传:
<script>
function checkExt() {
var allowedFiles = [".pdf"];
var form_valid = document.getElementById("fileToUpload");
var form_valid2 = document.getElementById("fileToUpload1");
var regex = new RegExp("([a-zA-Z0-9\s_\\.\-:])+(" + allowedFiles.join('|') + ")$");
if (!regex.test((form_valid.value.toLowerCase()) &&(form_valid2.value.toLowerCase()))) {
alert('only PDF files are allowed');
return false;
}
return true;
}
</script>
问题是:当我测试它时,它只检查第一个文件,如果它是pdf或不。它不检查第二个文件。
请参阅https://stackoverflow.com/questions/4234589/validation-of-file-extension-before-uploading-file –