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Update Rocket.md

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`@@ -255,6 +255,20 @@ MySQL为了保证ACID中的一致性和持久性,使用了WAL(Write-Ahead Logg`
`255`	`255`	`3. 减少交互次数(批量提交)`
`256`	`256`	`4. 设置合理的Fetch Size(数据每次返回给客户端的条数)`
`257`	`257`
	`258`	`+### PHP防止SQL注入`
	`259`	`+`
	`260`	`+1.过滤关键字`
	`261`	`+2.利用Mysqli和PDO`
	`262`	`+PDO命名参数以及参数绑定:`
	`263`	`+ $params = array(':username' => 'test', ':email' => $mail, ':last_login' => time());`
	`264`	`+ $pdo->prepare('SELECT * FROM user WHERE username = :username AND email = :emailAND last_login > :last_login');`
	`265`	`+ $pdo->execute($params);`
	`266`	`+`
	`267`	`+MySQLi的参数绑定:`
	`268`	`+ $query = $mysqli->prepare('SELECT * FROM users WHERE username = ? AND email = ? AND last_login > ?');`
	`269`	`+ $query->bind_param('sss', 'test', $mail, time() - 3600);`
	`270`	`+ $query->execute();`
	`271`	`+`
`258`	`272`	`## JVM`
`259`	`273`
`260`	`274`	`### 运行时数据区域`
`@@ -996,4 +1010,4 @@ select quantity from products WHERE id=3 for update;`
`996`	`1010`	```
`997`	`1011`	`quantity = select quantity from products WHERE id=3;`
`998`	`1012`	`update products set quantity = ($quantity-1) WHERE id=3 and queantity = $quantity;`
`999`		-```
	`1013`	+```

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