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HomeBackend DevelopmentPHP TutorialPHP调用MySQL存储过程并返回值的方法_php技巧

PHP调用MySQL存储过程并返回值的方法_php技巧

May 16, 2016 pm 08:27 PM
mysqlphpstored proceduremethodtransferreturn value

本文实例讲述了php中调用执行mysql存储过程然后返回由存储过程返回的值,分享给大家供大家参考。具体分析如下:

调用存储过程的方法.

a。如果存储过程有 IN/INOUT参数,声明一个变量,输入参数给存储过程,该变量是一对,一个php变量,也可以不必,只是没有php变量时,没有办法进行动态输入,一个Mysql变量.

b。如果存储过程有OUT变量,声明一个Mysql变量,mysql变量的声明比较特殊,必须让mysql服务器知道此变量的存在,其实也就是执行一条mysql语句,入set @mysqlvar=$phpvar ;

c。使用mysql_query()/mysql_db_query()执行mysql 变量声明语句。

代码如下:

复制代码 代码如下:
mysql_query("set @mysqlvar=$pbpvar");

这样,在mysql服务器里面就有一个变量,@mysqlar,如果时IN参数,那么其值可以有phpar传入.

例,利用mysqli函数实例,我们先可在mysql创建一个存储过程,代码如下:

复制代码 代码如下:
mysql> delimiter //
mysql> CREATE PROCEDURE employee_list (OUT param1 INT)
    -> BEGIN
    ->   SELECT COUNT(*) INTO param1 FROM t;
    -> END
    -> //
Query OK, 0 rows affected (0.00 sec)

然后在php中如下写,代码如下:
复制代码 代码如下:

Employee listing



Enter Department ID:



$hostname = "localhost";
$username = "root";
$password = "secret";
$database = "prod";
if (IsSet ($_POST['submit'])) {
     $dbh = new mysqli($hostname, $username, $password, $database);
     /* check connection */
     if (mysqli_connect_errno()) {
          printf("Connect failed: %sn", mysqli_connect_error());
          exit ();
     }
     $dept_id = $_POST['dept_id'];
     if ($result_set = $dbh->query("call employee_list( $dept_id )")) {
          print (' '.
               '');
          while ($row = $result_set->fetch_object()) {
               printf("n", 
                      $row->employee_id, $row->surname, $row->firstname);
          }
     } else {
          printf("

Error:%d (%s) %sn", mysqli_errno($dbh), 
                 mysqli_sqlstate($dbh), mysqli_error($dbh));
     }
     print ("

Employee_id Surname Firstname
%s %s %s
");
     $dbh->close();
}
?>

核心代码就是,代码如下:
复制代码 代码如下:
$result_set = $dbh->query("call employee_list( $dept_id )")

这句employee_list是我们的mysql存储过程.

希望本文所述对大家的php程序设计有所帮助。

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