PHP - 未定义的索引错误[关闭]

Question

This is my form with a file input field named photo:

<form action = "spremi-film.php" method = "POST" enctype = "multipart/form-data">
    <div class="grid_2">Naslov:</div>
    <div class="grid_10"><input type="text" name="naslov" value="" /></div>

    <div class="grid_2">Žanr: </div>
    <div class="grid_10"><?php izborZanra();   ?></div>

    <div class="grid_2">Godina: </div>
    <div class="grid_10"><?php izborGodine();   ?></div>

    <div class="grid_2">Trajanje:</div>
    <div class="grid_10"><input type="text" name="trajanje" value="" /></div>

    <div class="grid_2">Izbor slike:</div>
    <!--<input type="hidden" name="MAX_FILE_SIZE" value="30000" />-->
    <div class="grid_10"><input type="file" name="photo"  /></div>


    <div class="grid_12"><input type="submit" value="SPREMI" /></div>
</form>

After that i put this code:

$uploaddir = '/slike';
$uploadfile = $uploaddir . basename($_FILES['photo']['name']);

//echo '<pre>';

if(move_uploaded_file($_FILES['photo']['tmp_name'], $uploadfile))
{
    echo 'Slika je uspješno spremljena!';
}
else
{
    echo 'Slika nije spremljena!';
}

//print_r($_FILES);

//echo '</pre>';

When I run this I get an undefined index: photo notice in my browser.

Answer 1

The problem is that $_FILES['photo'] is only defined when the user uploads a file, not during the first execution of the script while displaying the form.

Check with isset($_FILES['photo']) before accessing the variable in the $uploadfile = ... and if (move_uploaded_file(... lines.