PHP?? Filter_Validate_ ? Filter_Sanitize_ ??? ??? ??????

PHP?? filter_var() ??? ??? ??? ???? ? ???? FILTER_VALIDATE_* ? FILTER_SANITIZE_* ? ?? ?? ???? ?? ? ??? ??? ?????. ? ??? ??? ??? ? ??? ???? ? ??????.

?? ?? _validate_* ?? ?? :

• ?? : ? ??? ???? ???? ? ?????. ??? ?? ??? ????? ???? false ??? true ?????.

• ??? : ?? ?? ??? ??? ????? FILTER_VALIDATE_EMAIL ??? ??? ? ????.

   <code class="php">$email = "example@example.com"; if (filter_var($email, FILTER_VALIDATE_EMAIL)) { echo "Valid email address."; } else { echo "Invalid email address."; }</code>

Filter_Sanitize _* ?? ?? :

• ?? : ? ??? ?? ???? ????? ???? ? ???? ?? ??? ? ??? ???? ?? ?????.

• ??? : ?? ??? ???? ?? ???? ????? FILTER_SANITIZE_STRING ??? ??? ? ????.

   <code class="php">$input = "<p>Hello, World!</p>"; $sanitized = filter_var($input, FILTER_SANITIZE_STRING); echo $sanitized; // Outputs: "Hello, World!"</code>

PHP? Filter_Validate_ ? Filter_Sanitize_ ??? ?? ???? ??????

PHP? FILTER_VALIDATE_* ? FILTER_SANITIZE_* ??? ?? ???? ??? ???? ???? ?????.

• ??:

  • FILTER_VALIDATE_* ??? ?? ??? ?? ???? ????? ???????. ???? ???? ??? ???? ?? ?? ?????.
  • FILTER_SANITIZE_* ??? ???? ????? ?? ?? ??? ????? ?? ???? ???? ?? ???? ????? ? ?????.

• ??:

  • FILTER_VALIDATE_* ??? ????? true ?? false ?? ??? ?? ?? ?? ????? (??? ??).
  • FILTER_SANITIZE_* ??? ?? ???? ?? ? ??? ?????.

• ??? ???? :

  • FILTER_VALIDATE_* ???? ? ???? ?? ?? ??? ????? ???? ? ? ?????.
  • FILTER_SANITIZE_* ??????? ????? ? ???? ???? ?? ?? ??? ??? ?? ???? ???? ? ?????.

PHP ?? ????? ??? ????? ?? Filter_Sanitize_* ??? ????? ??? ? ?????

FILTER_SANITIZE_* ?? ??? PHP ?? ????? ??? ????? ???? ? ????. ? ?? ??? ??? ????.

• ?? ?? :
  ????? ???? ?? ?? ??? ??? ??????. ?? ?? FILTER_SANITIZE_STRING ???? ??? ???? HTML ??? ??????.

   <code class="php">$userInput = $_POST['user_input']; $sanitizedInput = filter_var($userInput, FILTER_SANITIZE_STRING);</code>

• SQL ?? ?? :
  FILTER_SANITIZE_SPECIAL_CHARS ???? SQL ?? ??? ??? ??? ?? ??? ?????.

   <code class="php">$username = $_POST['username']; $sanitizedUsername = filter_var($username, FILTER_SANITIZE_SPECIAL_CHARS);</code>

• XSS ?? ?? :
  HTML? ?? ? ???? ???? ??? ??? ???? (XSS) ??? ?????. FILTER_SANITIZE_FULL_SPECIAL_CHARS ???? ?? ??? HTML ???? ??????.

   <code class="php">$comment = $_POST['comment']; $sanitizedComment = filter_var($comment, FILTER_SANITIZE_FULL_SPECIAL_CHARS); echo $sanitizedComment;</code>

• ??? ?? ???? :
  ????????, ?? ?? ???? ??? ???? ?? ????? ??? ??????.

PHP? ??? ??? ?? ????? ???? Filter_Validate_* ??? ??????

??? ????? PHP?? ?? ????? ???? FILTER_VALIDATE_* ?? ? ??? ??? ????.

• filter_validate_email :
  ??? ??? ???? ? ?????. ?? ???? ??? ??? ???? ?????.

   <code class="php">$email = "example@example.com"; if (filter_var($email, FILTER_VALIDATE_EMAIL)) { echo "Valid email address."; }</code>

• filter_validate_url :
  URL? ???? ? ?????. ?? ???? ??? URL ???? ?????.

   <code class="php">$url = "https://example.com"; if (filter_var($url, FILTER_VALIDATE_URL)) { echo "Valid URL."; }</code>

• filter_validate_ip :
  IP ??? ???? ? ?????. ?? ???? ??? IP ???? ?????.

   <code class="php">$ip = "192.168.0.1"; if (filter_var($ip, FILTER_VALIDATE_IP)) { echo "Valid IP address."; }</code>

• filter_validate_int :
  ??? ???? ? ?????. ?? ???? ??? ???? ?????.

   <code class="php">$number = "42"; if (filter_var($number, FILTER_VALIDATE_INT)) { echo "Valid integer."; }</code>

? ??? ?? ???? ???? ???? ?? ??? ?? ???? ??????? ???? ??? ????? ? ??????.

? ??? PHP?? Filter_Validate_*? Filter_Sanitize_*??? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!