PHP安全上传图片的方法
这篇文章主要介绍了PHP安全上传图片的方法,可检测图片类型实现安全判断图片的功能,非常具有实用价值,需要的朋友可以参考下
本文实例讲述了PHP安全上传图片的方法。分享给大家供大家参考。具体分析如下：
这段代码用于上传图片，可以根据图片类型检测图片是否安全，不是简单的检测扩展名
- <?php // upload.php
- echo <<<_END
- <html><head><title>PHP Form Upload</title></head><body>
- <form method='post' action='upload2.php' enctype='multipart/form-data'>
- Select a JPG, GIF, PNG or TIF File:
- <input type='file' name='filename' size='10' />
- <input type='submit' value='Upload' /></form>
- _END;
- if ($_FILES)
- {
- $name = $_FILES['filename']['name'];
- switch($_FILES['filename']['type'])
- {
- case 'image/jpeg': $ext = 'jpg'; break;
- case 'image/gif': $ext = 'gif'; break;
- case 'image/png': $ext = 'png'; break;
- case 'image/tiff': $ext = 'tif'; break;
- default: $ext = ''; break;
- }
- if ($ext)
- {
- $n = "image.$ext";
- move_uploaded_file($_FILES['filename']['tmp_name'], $n);
- echo "Uploaded image '$name' as '$n':<br />";
- echo "<img src='$n' />";
- }
- else echo "'$name' is not an accepted image file";
- }
- else echo "No image has been uploaded";
- echo "</body></html>";
- ?>