Call to undefined function TestimonialForm2Db()

[!eForm? &formid=`TestimonialForm` &subject=`Testimonial Submission Form` &from=`[email protected]` &tpl=`testimonial_form` &eformOnBeforeMailSent=`TestimonialForm2Db` &sendAsHtml=`1` &to=`[email protected]` &report=`testimonial_report` &thankyou=`whatYouThinkThankYou`!]

[+validationmessage+]
  <div class="form-wrapper">
  <form name="TestimonialForm" id="TestimonialForm" enctype="multipart/form-data" action="[~[*id*]~]" method="post">
					<input name="formid" type="hidden" value="TestimonialForm" />
					
					<div class="column first">
                                               <label for="firstname">First Name:<span class="red">*</span><br /></label><input type="text" id="firstname" name="firstname" value="" eform="First Name::1:" />
                                        </div>
                                        <div class="column second">
                                              <label for="lastname">Last Name:<span class="red">*</span></label><br /><input type="text" id="lastname" name="lastname" value="" eform="Last Name::1:" />
                                        </div>
                                        <div class="column third">   					
                                              <label for="email">Email:<span class="red">*</span></label><br /><input type="text" id="email" name="email" value="" eform="Email::email:1" />
                                        </div>

                                        <div class="clear"><!-- --></div> <br />             
                                             <div class="column first">
                                             <label for="golfcourse">Golf Course:<span class="red">*</span></label><br /><input type="text" id="golfcourse" name="golfcourse" value="" eform="Golf Course::1:" />
                                       </div>
               
                                       <div class="column second">
                                             <label for="city">City:<span class="red">*</span></label><br /><input type="text" id="city" name="city" value="" eform="City::1:" />
			        	 </div>					 
				 	<div class="column third">
                                             <label for="state" >State:<span class="red">*</span></label><br /><input type="text" id="state" name="state" value="" eform="State::1:" />
                                        </div>
			
			               <div class="clear"><!-- --></div> <br />
           			      <div class="column first">
                                              <label for="phone">Phone</label><br /><input type="text" id="phone" name="phone" value="" eform="Phone::1:" />
                                      </div>
                                      <div class="clear"><!-- --></div><br />          
                                        	   <label for="message">Message:</label><br /><textarea id="message" name="message" rows="10" cols="40" eform="Message::0:" ></textarea>
              
               
				      <div class="clear"><!-- --></div> <br />
                                                   <label style="text-align:left;" for="photo">Upload Photo:</label><br /><input type="file" id="photo" name="photo" value="" eform="Photo:file:0" />
                    
                    <div class="clear"><!-- --></div><br />
                      <input type="submit" value="Submit" />
</form>

<?php
function TestimonialForm2Db( &$fields )
	{
		// Bring needed resources into scope
		global $modx, $table_prefix;

		// Init our array
		$dbTable = array(); // key = DB Column; Value = Insert/Update value

		// Insert field/value pairs to insert/update in our table
		$dbTable[firstname] = $fields[firstname];
		$dbTable[lastname] = $fields[lastname];
		$dbTable[email] = $fields[email];
		$dbTable[golfcourse] = $fields[golfcourse];
		$dbTable[city] = $fields[city];
		$dbTable[state] = $fields[state];
		$dbTable[phone] = $fields[phone];
		$dbTable[message] = $fields[message];
		$dbTable[photo] = $fields[photo];


		// INSERT - $dbQuery = $modx->db->insert( $dbTable, $table_prefix . 'insertTableName' );
		// UPDATE - $dbQuery = $modx->db->update( $dbTable, $table_prefix . 'updateTableName' );
		// DELETE - $dbQuery = $modx->db->delete( $table_prefix . 'deleteFromTableName', 'some_field = 1 AND name=\''.$dbTable[name].'\'', '' );
		// etc...
				
		// Run the db insert query
		$dbQuery = $modx->db->insert( $dbTable, 'testimonial' );		

		return true;
	}
	// Return empty string
	return '';
?>