PHP function for uploading files error

I am doing a site, and I made a form in html, than made an upload function for avatars which after that I want the file to be shown in a preview in the browser near the upload form. I did the function in php on another file and linked it to the respective upload form, problem is the server is getting me an error on line 7 which is actually the $goto1 variable, any ideea why is this happening? Here is the code to both, html upload form and php function:
HTML Code:

<form action="avatar_upload.php" method="post">						<!--Avatar upload form-->
Upload avatar:<input type="file" name="avatar_upload" />
<input type="submit" value="Upload avatar" name="avatarUploadaSubmit"><br/>
<div class="font-style-desc">
Avatar upload image. Please pick a avatar upload image. Image<br/> 
type must be JPEG or PNG only, must not be larger than 500KB <br/>
 and has to be no larger than 136 in width and 164 in height. 
</div class="font-style-desc">
	<form name="avatarImage" action="avatar_upload.php">							<!--Synched avatar image-->
	<input type="image" action="avatar_upload.php">
	
</form>

HTML:

PHP code:

<?php

function moveToDir(){													//function to move uploaded images to chosen folder in $destination variable and to upload the file itself
$uploadedFile=$_FILES["avatar_upload"];
$destination='/images/avatars';
$avatarUploadSubmit=$_["avatarUploadaSubmit"];
$goto1=bool move_uploaded_file(string $uploadedFile, string $destination);

	if($avatarUploadSubmit==true){
		echo $goto1;

			}
}

else function moveToDir( > 0){

echo "Error, could not upload file: " .$uploadedFile["error"]. "<br/>"}

else{
echo "Uploaded: ".$uploadedFile["name"];

} 
?>

PHP:

 

remove the word "string" from the goto line.

 

looks like lots of bug in code.
You need clean code for uploading the file to server.

 

don't forget to add enctype="multipart/form-data" if your dealing w/ files ..