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PHP调用MySQL存储过程并返回值实现程序

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Release: 2016-05-25 16:37:46
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本文章来给大家详细介绍在php中如何来调用执行mysql存储过程然后返回由存储过程返回的值了,有需要了解的同学可进入参考.

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: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:

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) 
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然后在php中如下写,代码如下:

<h1>Employee listing</h1> 
	<form method="post" > 
	<p>Enter Department ID: 
	<input type="text" name="dept_id" size="4"> 
	<input type="submit" name="submit" value="submit"><p> 
	</form> 
	<?php 
	$hostname = "localhost"; 
	$username = "root"; 
	$password = "secret"; 
	$database = "prod"; 
	if (IsSet ($_POST[&#39;submit&#39;])) { 
	     $dbh = new mysqli($hostname, $username, $password, $database); 
	     /* check connection */ 
	     if (mysqli_connect_errno()) { 
	          printf("Connect failed: %sn", mysqli_connect_error()); 
	          exit (); 
	     } 
	     $dept_id = $_POST[&#39;dept_id&#39;]; 
	     if ($result_set = $dbh->query("call employee_list( $dept_id )")) { 
	          print (&#39;<table border="1" width="30%"> <tr> &#39;. 
	               &#39;<td>Employee_id</td><td>Surname</td><td>Firstname</td></tr>&#39;);//开源代码phprm.com 
	          while ($row = $result_set->fetch_object()) { 
	               printf("<tr><td>%s</td><td>%s</td><td>%s</td></tr>n",  
	                      $row->employee_id, $row->surname, $row->firstname); 
	          } 
	     } else { 
	          printf("<p>Error:%d (%s) %sn", mysqli_errno($dbh),  
	                 mysqli_sqlstate($dbh), mysqli_error($dbh)); 
	     } 
	     print ("</table> "); 
	     $dbh->close(); 
	} 
	 
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核心代码就是,代码如下:

$result_set = $dbh->query("call employee_list( $dept_id )")

这句了employee_list是我们的mysql存储过程了.

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