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? ??? ?? PHP ???? SQL ??? ???? ?? MySQL ?? PHP ??? ???? ???? ??? ??????

SQL ??? ???? ?? MySQL ?? PHP ??? ???? ???? ??? ??????

Dec 25, 2024 pm 04:47 PM

How to Safely Insert PHP Variables into MySQL Statements to Prevent SQL Injection?

MySQL ?? PHP ?? ??

MySQL ?? PHP ??? ??? ? ??? ???? ???? ??? ???? ???? ?? ??? ???? ?? ?????. ???? ?? ???.

1. ??? ???? ?? ??? ? ??

??: SQL ??? ???(??? ?? ??)? ???? ?? PHP ??? ??? ?? ?? ????? ???.

??: ??? ?? SQL ??? ???? ???? ???? ?????.

??:

  • SQL ???? ??? ?? ???? ????.
  • ??? ?????.
  • ??? ?? ???? ??????.
  • ??? ?????. query.

mysqli ?? ?:

$type = 'testing';
$reporter = "John";
$sql = "INSERT INTO contents (type, reporter, description) VALUES ('whatever', ?, ?)";
$stmt = $mysqli->prepare($sql);
$stmt->bind_param("ss", $reporter, $description);
$stmt->execute();

PDO ?? ??:

$type = 'testing';
$reporter = "John";
$sql = "INSERT INTO contents (type, reporter, description) VALUES ('whatever', ?, ?)";
$stmt = $pdo->prepare($sql);
$stmt->execute([$reporter, $description]);

2. ?? ??? ?? ?????? ???

??: ?? ?? ??(???, ???)? ???? ??? ??? ?? "??? ???"? ?? ?????? ???.

??: ???? ???? ???? ?? ?? ??? ????? ???.

??:

  • ??? ? ??? ????.
  • ??? ??? ???? ?? ??? ??? ?? ?????. .
  • ?????? ??? ?? ??? ??? ?????(?: ?? MySQL).

?:

$orderby = $_GET['orderby'] ?: "name";
$allowed = ["name", "price", "qty"];
$key = array_search($orderby, $allowed, true);
if ($key === false) {
    throw new InvalidArgumentException("Invalid field name");
}
$query = "SELECT * FROM `table` ORDER BY `$orderby` $direction";

? ??? SQL ??? ???? ?? MySQL ?? PHP ??? ???? ???? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!

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Undresser.AI Undress

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AI Clothes Remover

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