php三个函数、两种挑选防备sql注入【php教程】,sql,注入

三个函数：

1. addslashes($string):用反斜线援用字符串中的特别字符' " \

$username=addslashes($username);

2. mysql_escape_string($string)：用反斜杠转义字符串中的特别字符，用于mysql_query()查询。

$username=mysql_escape_string($username);

3. mysql_real_escape_string($string)：转义SQL语句中运用的字符串中的特别字符，并考虑到衔接的当前字符集，须要保证当前是衔接状况才能用该函数，不然会报正告。不转义%与_

$username=mysql_real_escape_string($username);

两种挑选：

1. 运用PDO

$stmt = $pdo->prepare('SELECT * FROM user WHERE name = :name');
$stmt->execute(array(':name' => $name));
foreach ($stmt as $row) {
// do something with $row
}

2. 运用mysqli

$stmt = $dbConnection->prepare('SELECT * FROM user WHERE name = ?');
$stmt->bind_param('s', $name);
$stmt->execute();
$result = $stmt->get_result();
while ($row = $result->fetch_assoc()) {
// do something with $row
}

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