Php performs file hash operations
This code is very useful. if you download a file and the website provides the hash result, you can perform a hash operation on the downloaded file to verify that the downloaded file is correct.
- 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 ['expash ']! = 'None '&&! Empty ($ _ POST ['expyash ']) {
- Echo 'expected hash: '. $ _ POST ['expyash'].'
';
- Echo ($ hash = $ _ POST ['expyash '])? 'Hash matched expected value.':'Hash did not match expected value.';
- Echo'
';
- }
- }
- }
- ?>
-
- Again
- } Else {
- ?>
-
- }
- ?>
|
Php, hash
