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php调用mysql存储过程实例分析_php技巧

May 16, 2016 pm 08:26 PM
mysql php stored procedure transfer

本文实例分析了php调用mysql存储过程的方法。分享给大家供大家参考。具体分析如下:

Mysql存储过程创建语法,代码如下:

CREATE PROCEDURE和CREATE FUNCTION :

复制代码 代码如下:
CREATE PROCEDURE sp_name ([proc_parameter[,...]])
 
    [characteristic ...] routine_body
 
CREATE FUNCTION sp_name ([func_parameter[,...]])
 
    RETURNS type
 
    [characteristic ...] routine_body
 
    proc_parameter:
 
    [ IN | OUT | INOUT ] param_name type
 
    func_parameter:
 
    param_name type
 
type:
 
    Any valid MySQL data type
 
characteristic:
 
    LANGUAGE SQL
 
  | [NOT] DETERMINISTIC
 
  | { CONTAINS SQL | NO SQL | READS SQL DATA | MODIFIES SQL DATA }
 
  | SQL SECURITY { DEFINER | INVOKER }
 
  | COMMENT 'string'
 
routine_body:
 
    Valid SQL procedure statement or statements

当我们看完以后,就可以开始写一些简单的存储过程了,首先建立存储过程, Create procedure(子程序)、Create function(函数),代码如下:
复制代码 代码如下:
Create procedure sp_Name ([proc_parameter ])
routine_body

这里的参数类型可以是 IN OUT INOUTT,意思和单词的意思是一样的,IN 表示是传进来的参数,OUT 是表示传出去的参数,INOUT 是表示传进来但最终传回的参数,代码如下:

复制代码 代码如下:
Create functionsp_Name ([func_parameter ])
Returns type
Routine_body

Returns type 指定了返回的类型,这里给定的类型与返回值的类型要是一样的,否则会报错,下面是一个简单的例子,代码如下:

复制代码 代码如下:
mysql> delimiter //
mysql> create procedure g
    -> begin
    -> select version() i
    -> end
    -> //
Query OK, 0 rows affected
 
mysql> call getversion(@a
    -> //
Query OK, 0 rows affected
 
mysql> select @a;
    -> //
+---------------------+
| @a                  |
+---------------------+
| 5.0.45-community-nt |
+---------------------+
1 row in set (0.05 sec)

一个获取当前mysql版本的存储过程.那么php怎么与mysql的存储过程相结合呢.以下来自百度知道,代码如下:
复制代码 代码如下:
Drop table if exists user;  
    Create table user(  
        Id int unsigned not null auto_increment,  
        Name varchar(20) not null,  
        Pwd char(32) not null,  
        Primary key(Id)  
);

添加用户的存储过程,代码如下:
复制代码 代码如下:
Delimiter //  
    Create procedure insertuser(in username varchar(20),in userpwd varchar(32))  
    Begin  
        Insert into welefen.user(Name,Pwd) values (username,md5(userpwd));  
    End  
    //

验证用户的存储过程,代码如下:
复制代码 代码如下:
Delimiter //  
    Create procedure validateuser(in username varchar(20),out param1)  
    Begin   
        Select Pwd into param1 from welefen.user where Name=username;  
    End  
    //

修改密码的存储过程,代码如下:
复制代码 代码如下:
Delimiter //  
    Create procedure modifyPwd(in username varchar(20),in userpwd varchar(32))  
    Begin  
        Update welefen.user set Pwd=md5(userpwd) where Name=username;  
    End  
    //

删除用户的存储过程,代码如下:
复制代码 代码如下:
Delimiter //  
    Create procedure deleteuser(in username varchar(20)) 
Begin  
         delete from welefen.user where Name=username;  
    End  
    //

在客户端,我们给出如下的程序,代码如下:
复制代码 代码如下:
     if (!mysql_connect("localhost","root","welefen")){   
         echo "连接数据库失败";  
    }  
     if (!mysql_select_db("welefen")){  
         echo "选择数据库表失败
";  
    }  
      
    $insert_user=array("welefen","welefen");//这里的welefen分别为用户名、密码  
     if (mysql_query("call insertuser('$insert_user[0]','$insert_user[1]')")){  
         echo "添加用户$insert_user[0]成功
";  
    }else {  
         echo "添加用户$insert_user[0]失败
";  
    }  
      
    $validate_user=array("welefen","welefen");//这里的welefen分别为用户名、密码  
    mysql_query("call validateuser('$validate_user[0]',@a)");  
    $Pwd=mysql_query("select @a");  
    $result=mysql_fetch_array($Pwd);  
     if ($result[0]==md5($validate_user[1])){  
         echo "用户$validate_user[0]验证正确
";  
    }else {  
         echo "用户$validate_user[0]验证错误
";  
    }  
      
    $modify_Pwd=array("welefen","weilefeng"); //welefen为用户名weilefeng为新密码  
     if (mysql_query("call modifyPwd('$modify_Pwd[0]','$modify_Pwd[1]')")){ 
         echo "用户$modigy_Pwd[0]的密码修改成功
";  
    }else {
         echo "用户$modigy_Pwd[0]的密码修改失败
";  
    }  
      
    $delete_user=array("welefen");           //welefen为用户名  
     if (mysql_query("call deleteuser('$delete_user[0]')")){  
         echo "用户$delete_user[0]删除成功
";  
    }else {  
         echo "用户$delete_user[0]删除失败
";  
    }  
?>

这样就完成了,php调用mysql的存储过程,其实这些简单的应用,就用不上存储过程了,实际的应用是比这个复杂的多,可以看出,建立了mysql的存储过程可以极大的减少了客服端的压力,但是增加了数据库服务的压力,各种利弊得实际去衡量.

希望本文所述对大家的php程序设计有所帮助。

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