本文實例講述了php中調用執行mysql存儲過程然后返回由存儲過程返回的值,分享給大家供大家參考。具體分析如下：
調用存儲過程的方法.
a。如果存儲過程有 IN/INOUT參數,聲明一個變量,輸入參數給存儲過程,該變量是一對,一個php變量,也可以不必,只是沒有php變量時,沒有辦法進行動態輸入,一個Mysql變量.
b。如果存儲過程有OUT變量,聲明一個Mysql變量,mysql變量的聲明比較特殊,必須讓mysql服務器知道此變量的存在,其實也就是執行一條mysql語句,入set @mysqlvar=$phpvar ;
c。使用mysql_query()/mysql_db_query()執行mysql 變量聲明語句。
代碼如下:
復制代碼代碼如下:
mysql_query("set @mysqlvar=$pbpvar");
這樣,在mysql服務器里面就有一個變量,@mysqlar,如果時IN參數,那么其值可以有phpar傳入.
例,利用mysqli函數實例,我們先可在mysql創建一個存儲過程,代碼如下:
復制代碼代碼如下:
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中如下寫,代碼如下:
復制代碼代碼如下:
<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();
}
?>
核心代碼就是,代碼如下:
復制代碼代碼如下:
$result_set = $dbh->query("call employee_list( $dept_id )")
這句employee_list是我們的mysql存儲過程.
希望本文所述對大家的php程序設計有所幫助。
