php源码之将文件上传到服务器

html form表单代码：

<form action=\"<?php print $PHP_SELF?>\" enctype=\"multipart/form-data\" method=\"post\">
   Last Name:<br /> <input type=\"text\" name=\"name\" value=\"\" /><br />
   Homework:<br /> <input type=\"file\" name=\"homework\" value=\"\" /><br />
   <p><input type=\"submit\" name=\"submit\" value=\"Submit Notes\" /></p>
</form>

php处理表单数据并上传文件到服务器源码：

<?php
   define (\"FILEREPOSITORY\",\"./\");

   if (isset($_FILES[\'homework\'])) {

      if (is_uploaded_file($_FILES[\'homework\'][\'tmp_name\'])) {

         if ($_FILES[\'homework\'][\'type\'] != \"application/pdf\") {
            echo \"<p>Homework must be uploaded in PDF format.</p>\";
         } else {
            $today = date(\"m-d-Y\");
            if (! is_dir(FILEREPOSITORY.$today)) {
               mkdir(FILEREPOSITORY.$today);
            }
            /* http://www.manongjc.com/article/1389.html */
            $name = $_POST[\'name\'];
            $result = move_uploaded_file($_FILES[\'homework\'][\'tmp_name\'], FILEREPOSITORY.$today.\"/\".\"$name.pdf\");

            if ($result == 1) 
               echo \"<p>File successfully uploaded.</p>\";
            else 
               echo \"<p>There was a problem uploading the homework.</p>\";
         }
      }
   }
?>