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Fabbrica Divani Chester - Boheme Salotti
Produzione Artigianale di divani Chesterfield classici senza tempo. I nostri eleganti divani Chesterfield sono realizzati a mano da esperti artigiani direttamente nella nostra fabbrica ad Altamura, il centro del Triangolo del Salotto. Acquista direttamente dalla Fabbrica e risparmia su divani e poltrone Chesterfield.
Arredo Da Me - Soluzioni d'arredo per casa e giardino
Arredo Da Me è un sito di commercio elettronico che offre molte soluzioni per l'arredo degli ambienti della casa come: giardino, garage, lavanderia, bagno, salotto e cucina. Casette in resina e in legno, armadi in resina per interni ed esterni, box doccia, lavabi e armadietti in ABS e PVC, barbecue, piscine ecc.
Scaricatore di condensa automatico aria compressa
Trappole e scaricatori di condensa che in modo automatico lavorano sui compressori o sui sistemi che genera aria compressa.
Inquinamento Italia
Il portale dell’inquinamento in Italia: un sito divulgativo per imparare a capirlo, misurarlo e prevenirlo.

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PHP manual

User Submitted Data

The greatest weakness in many PHP programs is not inherent in the language itself, but merely an issue of code not being written with security in mind. For this reason, you should always take the time to consider the implications of a given piece of code, to ascertain the possible damage if an unexpected variable is submitted to it.

Example #1 Dangerous Variable Usage

// remove a file from the user's home directory... or maybe
// somebody else's?
unlink ($evil_var);

// Write logging of their access... or maybe an /etc/passwd entry?
fwrite ($fp$evil_var);

// Execute something trivial.. or rm -rf *?
system ($evil_var);
exec ($evil_var);


You should always carefully examine your code to make sure that any variables being submitted from a web browser are being properly checked, and ask yourself the following questions:

  • Will this script only affect the intended files?
  • Can unusual or undesirable data be acted upon?
  • Can this script be used in unintended ways?
  • Can this be used in conjunction with other scripts in a negative manner?
  • Will any transactions be adequately logged?

By adequately asking these questions while writing the script, rather than later, you prevent an unfortunate re-write when you need to increase your security. By starting out with this mindset, you won't guarantee the security of your system, but you can help improve it.

You may also want to consider turning off register_globals, magic_quotes, or other convenience settings which may confuse you as to the validity, source, or value of a given variable. Working with PHP in error_reporting(E_ALL) mode can also help warn you about variables being used before they are checked or initialized (so you can prevent unusual data from being operated upon).