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这段代码非常有用，如果你下载了一个文件，网站提供了hash结果，你可以对你下载下来的文件进行hash运算，以验证下载的文件是否正确。
-
-
- Hash (Check) Files
-
-
-
- if(!empty($_FILES)){
- if ($_FILES["file"]["error"] > 0){
- switch($_FILES["file"]["error"]){
- case 1:
- echo "Error: The uploaded file exceeds the upload_max_filesize directive in php.ini
";
- break;
- case 2:
- echo "Error: The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form.
";
- break;
- case 3:
- echo "Error: The uploaded file was only partially uploaded.
";
- break;
- case 4:
- echo "Error: No file was uploaded.
";
- break;
- case 6:
- echo "Error: Missing a temporary folder.
";
- break;
- case 7:
- echo "Error: Failed to write file to disk.
";
- break;
- case 8:
- echo "Error: A PHP extension stopped the file upload.
";
- break;
- default:
- echo "Unknown error occured.
";
- }
- } else {
- echo 'Upload: ' . $_FILES['file']['name'] . '
';
- echo 'Type: ' . $_FILES['file']['type'] . '
';
- echo 'Size: ' . (round($_FILES['file']['size'] / 1024, 2)) . ' Kb
';
- if(array_search($_POST['algo'], hash_algos())===false){
- echo 'Unknown hashing algorithm requested.
';
- } else {
- echo 'Hashing Algorithm: '. $_POST['algo'] . '
';
- $hash = hash_file($_POST['algo'], $_FILES['file']['tmp_name']);
- echo 'Calculated hash: ' . $hash . '
';
- if($_POST['exphash']!=='none' && !empty($_POST['exphash'])){
- echo 'Expected hash: ' . $_POST['exphash'] . '
';
- echo ($hash==$_POST['exphash'])? 'Hash matched expected value.' : 'Hash did not match expected value.';
- echo '
';
- }
- }
- }
- ?>
-
-
- } else {
- ?>
-
- }
- ?>
-
-
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