File Uploading in PHP

1. File Uploading in PHP Shoaib Yasin Idrees Hussain Maqbool Ali

2. HTTP File Upload ( RFC 1867 ) <form action=" file_upload.php " method="post" enctype ="multipart/form-data" > “No characters are encoded. This value is required when you are using forms that have a file upload control” <input type="hidden" name="MAX_FILE_SIZE" value="30000" /> <input type="file" name="upload" /> <input type="submit" value="Upload" /> </form> Set attribute METHOD="POST" Set attribute ENCTYPE="multipart/form-data" Use INPUT element with TYPE="file" to create a file upload control (one control per file) Hidden input field MAX_FILE_SIZE recommends to the web client the limit of the size of the uploaded file.

3. The $_FILES Array Index Meaning name The original name of the file (as it was on the user's computer). type The MIME type of the file, as provided by the browser. size The size of the uploaded file in bytes. tmp_name The temporary filename of the uploaded file as it was stored on the server. error The error code associated with any problem.

4. Processing the uploaded items // "upload" is the name assigned to the input element, as in // <input type="file" name="upload" /> if ( isset ( $_FILES['upload'] )) { if ( $_FILES['upload']['error'] > 0)) { // File upload fails. See next slide for detailed info about the // meaning of the error code. } else { // e.g., only allows JPEG image files to be uploaded // Note: This is not a complete list of MIME types for JPEG images $allowed = array('image/jpeg', 'image/jpg'); // Continue next page …

5. Processing the uploaded items if ( in_array ( $_FILES['upload']['type'] , $allowed)) { $ tmp = $_FILES['upload'][' tmp_name '] ; $ dst = "C:/uploads/{ $_FILES['upload']['name'] }"; if ( move_upload_file ($ tmp , $ dst )) { // Success ! } } } // End of else }

6. Error Messages Explained UPLOAD_ERR_OK Value: 0; There is no error, the file uploaded with success. UPLOAD_ERR_INI_SIZE Value: 1; The uploaded file exceeds the upload_max_filesize directive in php.ini . UPLOAD_ERR_FORM_SIZE Value: 2; The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form. UPLOAD_ERR_PARTIAL Value: 3; The uploaded file was only partially uploaded. UPLOAD_ERR_NO_FILE Value: 4; No file was uploaded.