应对方法:
1.mysql_escape_string()
转义特殊字符((PHP 4 >= 4.3.0, PHP 5))(mysql_real_escape_string必须先链接上数据库,否则会报错)
下列字符受影响:
\x00 //对应于ascii字符的NULL \n //换行符且回到下一行的最前端 \r //换行符 \ //转义符 ' " \x1a //16进制数
如果成功,则该函数返回被转义的字符串。如果失败,则返回 false。
2.addslashes()
: 函数返回在预定义字符之前添加反斜杠的字符串 (stripslashes()
实现字符串还原)
预定义的字符有:
单引号(') 双引号(") 反斜杠(\) NULL
3.prepared statements(预处理机制)
<?php $mysqli = new mysqli("example.com", "user", "password", "database"); if ($mysqli->connect_errno) { echo "Failed to connect to MySQL: (" . $mysqli->connect_errno . ") " . $mysqli->connect_error; } /* Non-prepared statement */ if (!$mysqli->query("DROP TABLE IF EXISTS test") || !$mysqli->query("CREATE TABLE test(id INT)")) { echo "Table creation failed: (" . $mysqli->errno . ") " . $mysqli->error; } /* Prepared statement, stage 1: prepare */ if (!($stmt = $mysqli->prepare("INSERT INTO test(id) VALUES (?)"))) { echo "Prepare failed: (" . $mysqli->errno . ") " . $mysqli->error; } /* Prepared statement, stage 2: bind and execute */ $id = 1; if (!$stmt->bind_param("i", $id)) { echo "Binding parameters failed: (" . $stmt->errno . ") " . $stmt->error; } if (!$stmt->execute()) { echo "Execute failed: (" . $stmt->errno . ") " . $stmt->error; } ?>