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? ??? ?? PHP ???? PDO ?? ?? ?? SQL ??? ??????

PDO ?? ?? ?? SQL ??? ??????

Dec 28, 2024 am 12:31 AM

Do PDO Prepared Statements Always Prevent SQL Injection?

PDO ?? ?? SQL ??? ????? ??????

PDO(PHP ??? ??) ?? ?? SQL??? ???? ??? ?????. ??. ??? ? ??????? ??? ????? ??? ???? ?? ?????.

?????? ?? ??:

????? PDO? MySQL? ??? ???? ????????. ??? ? ??????? ??? ???? ??? ? ?? ?? ??? ????. ? ?? ??????? ??? ????.

  1. ??? ?? ??? ?????? '(????)? ???? ????? ??? ???? ?? ???? ?????.
  2. ??? ??? ???? ????? ?????. ??? ????? ??.
  3. PDO? ????? MySQL C API ?? mysql_real_escape_string()? ???? ????? ????????. ?? ?? ?? ??? ?? ?????.
  4. ????? ???? ?? ????? ??? ??? ?? ???? ???? ??????? ?? ' ??? ?????.
  5. ? ?????? ' ??? ??? ? ????. SQL ?? ??? ?????.

??:

? ??? ????? PDO ?? PDO::ATTR_EMULATE_PREPARES? false? ???? ?????? ??? ?? ????? ? ????. ??? ?? PDO? ? ??? ?? ??? ???? ???? ???.

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

  • ??? ?? ?? ???? ???? ?? ?? ??? ?????. UTF-8.
  • NO_BACKSLASH_ESCAPES SQL ??? mode.

??? ?:

?? ?? PDO ??? ?? ??? ??? ?????.

// Disable emulated prepares and use non-vulnerable character set
$pdo->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
$pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
$query = 'SELECT * FROM users WHERE username = ?';
$stmt = $dbh->prepare($query);
$stmt->execute( array(':username' => $_REQUEST['username']) );
// Use DSN charset parameter in PHP ≥ 5.3.6
$pdo = new PDO('mysql:host=localhost;dbname=testdb;charset=gbk', $user, $password);
$query = 'SELECT * FROM users WHERE username = ?';
$stmt = $dbh->prepare($query);
$stmt->execute( array(':username' => $_REQUEST['username']) );

In ????? PDO ??? ???? ?? ????? SQL ??? ???? ? ????? ???? ???? ???? ???? ?? ?????. ?????? ??? ?? ?? ??? ???? ?? ??? ??? ?????? ???? ?????? ??????? ????? ??? ? ????.

? ??? PDO ?? ?? ?? SQL ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!

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Undresser.AI Undress

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AI Clothes Remover

AI Clothes Remover

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