84669 person learning
152542 person learning
20005 person learning
5487 person learning
7821 person learning
359900 person learning
3350 person learning
180660 person learning
48569 person learning
18603 person learning
40936 person learning
1549 person learning
1183 person learning
32909 person learning
假设我用php接收表单上传的文件,怎么实现给上传的文件改名(改成其文件md5值,以防止重名),而且保留后缀。最好能给一段示例代码
认证高级PHP讲师
假设表单如此:
<form action="upload_file.php" method="post" enctype="multipart/form-data"> <label for="file">Filename:</label> <input type="file" name="form_file_name" id="file" /> <br /> <input type="submit" name="submit" value="Submit" /> </form>
<?php // 检查错误什么的就不写了 $filename = $_FILES['form_file_name']["tmp_name"]; $md5 = md5_file($filename); $ext = pathinfo($_FILES['form_file_name']['name'], PATHINFO_EXTENSION); move_uploaded_file($filename, $md5.'.'.$ext); ?>
这样可以换名字:$str=’test.name’;$pos=strrpos($str,’.’);echo substr_replace($str,md5(substr($str,0,$pos)),0,$pos);手机写代码好费劲。。。
假设表单如此:
这样可以换名字:
$str=’test.name’;
$pos=strrpos($str,’.’);
echo substr_replace($str,md5(substr($str,0,$pos)),0,$pos);
手机写代码好费劲。。。