[MySQL][PHP]Powtarzajace się nazwy plików w bazie Opcje

[imlegend]

Mój kod do wysyłania obrazków na serwer ftp i tytułu do bazy. Jak go przekształcić aby nie dochodziło do sytuacji, w której
dwóch użytkowników przyśle mi do bazy różne zdjęcia o tej samej nazwie ? Bo wtedy dwa wpisy mają te same zdjęcia, a zdjęcia tego pierwszego wpisu są
nadpisywane nowymi. Może są jakieś w miarę proste sposoby na to ?

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 $target = "wyslane/"; 
 $target1 = "wyslane/";
  $target2 = "wyslane/";
   $target3 = "wyslane/";
    $target4 = "wyslane/";
	 $target5 = "wyslane/";
 
 $target = $target . basename( $_FILES['photo']['name']); 
	$target1 = $target1 . basename( $_FILES['photo1']['name']); 
	$target2 = $target2 . basename( $_FILES['photo2']['name']);
	$target3 = $target3 . basename( $_FILES['photo3']['name']);
	$target4 = $target4 . basename( $_FILES['photo4']['name']);
	$target5 = $target5 . basename( $_FILES['photo5']['name']);
 
 //This gets all the other information from the form 
 	$login = $_SESSION['login']; 	
  $name=$_POST['name']; 
	$name1 =$_POST['name1'];
	$name2 =$_POST['name2'];
	$name3 =$_POST['name3'];
	$name4 =$_POST['name4'];
	$name5 =$_POST['name5'];
  $pic=($_FILES['photo']['name']); 
 $pic1=($_FILES['photo1']['name']); 
  $pic2=($_FILES['photo2']['name']); 
   $pic3=($_FILES['photo3']['name']); 
    $pic4=($_FILES['photo4']['name']); 
	 $pic5=($_FILES['photo5']['name']); 
 
  $id=$_SESSION['id'];
 // Connects to your Database 
 
 
 
 	//$op = mysql_query("select id from users where id = '$id' ");
 //Writes the information to the database 
 //mysql_query("INSERT INTO users (name, photo, photo1, name1) VALUES ('$name', '$pic' ,'$pic1', '$name1')") ; 
 
 
  mysql_query("UPDATE users SET name='$name', name1='$name1', name2='$name2', name3='$name3', name4='$name4', name5='$name5', photo = '$pic', photo1 = '$pic1', photo2 = '$pic2', photo3 = '$pic3', photo4 = '$pic4', photo5 = '$pic5' WHERE  login = '$login' ");
 
 
	$allowed = array('jpg', 'jpeg', 'gif', 'png');  
 
 //Writes the photo to the server 
 if(move_uploaded_file($_FILES['photo']['tmp_name'] ,$target) )
 { 
 
 
 
 
 //Tells you if its all ok 
 echo "The file ". basename( $_FILES['photo']['name'] ). " has been uploaded, and your information has been added to the directory"; 
echo implode(', ', $allowed);
 } 
 
 
if(move_uploaded_file($_FILES['photo1']['tmp_name'] ,$target1) )
 { 
 
 //Tells you if its all ok 
 echo "The file ". basename( $_FILES['photo1']['name'] ). " has been uploaded, and your information has been added to the directory"; 
 echo implode(', ', $allowed);
 } 
 
 if(move_uploaded_file($_FILES['photo2']['tmp_name'] ,$target2) )
 { 
 
 //Tells you if its all ok 
 echo "The file ". basename( $_FILES['photo2']['name'] ). " has been uploaded, and your information has been added to the directory"; 
 echo implode(', ', $allowed);
 } 
 
 if(move_uploaded_file($_FILES['photo3']['tmp_name'] ,$target3) )
 { 
 
 //Tells you if its all ok 
 echo "The file ". basename( $_FILES['photo3']['name'] ). " has been uploaded, and your information has been added to the directory"; 
 echo implode(', ', $allowed);
 } 
 
 if(move_uploaded_file($_FILES['photo4']['tmp_name'] ,$target4) )
 { 
 
 //Tells you if its all ok 
 echo "The file ". basename( $_FILES['photo4']['name'] ). " has been uploaded, and your information has been added to the directory"; 
 echo implode(', ', $allowed);
 } 
 
 if(move_uploaded_file($_FILES['photo5']['tmp_name'] ,$target5) )
 { 
 
 //Tells you if its all ok 
 echo "The file ". basename( $_FILES['photo5']['name'] ). " has been uploaded, and your information has been added to the directory"; 
  echo implode(', ', $allowed);
 } 
 
 
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[chmiello]

możesz wygenerować hash za pomocą md5_file i zapisywać je w baze, potem przesyłając nowy plikm, generujesz dla niego md5_file i porównujesz, czy takie coś nie istnieje w bazie - nie wiem czy o coś takiego Ci chodziło, ale powinno zadziałać

[emillo91]

Możesz do tego użyć funkcji time() i żeby było jeszcze lepiej połączyć ją z funkcją rand() która wymiesza znaki. Dla przykładu:

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$czas = time();
$random = rand(1, $czas); 
$szyfruj = md5($random);
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