PHP调用MySQL存储过程并返回值的方法
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)
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:
<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['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( $dept_id )")) {
print ('<table border="1" width="30%"> <tr> '.
'<td>Employee_id</td><td>Surname</td><td>Firstname</td></tr>');
while ($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();
}
?>
<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['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( $dept_id )")) {
print ('<table border="1" width="30%"> <tr> '.
'<td>Employee_id</td><td>Surname</td><td>Firstname</td></tr>');
while ($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();
}
?>
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。