mysqli_stmt::$param_count
(PHP 5, PHP 7)
mysqli_stmt :: $ param_count - mysqli_stmt_param_count - 返回给定语句的参数个数
描述
面向对象的风格
int $mysqli_stmt->param_count;
程序风格
int mysqli_stmt_param_count ( mysqli_stmt $stmt )返回准备好的语句中存在的参数标记的数量。
参数
`stmt` 仅过程风格：由mysqli_stmt_init（）返回的语句标识符。
返回值
返回一个表示参数数量的整数。
例子
Example #1 Object oriented style
<?php
$mysqli?=?new?mysqli("localhost",?"my_user",?"my_password",?"world");
/*?check?connection?*/
if?(mysqli_connect_errno())?{
????printf("Connect?failed:?%s\n",?mysqli_connect_error());
????exit();
}
if?($stmt?=?$mysqli->prepare("SELECT?Name?FROM?Country?WHERE?Name=??OR?Code=?"))?{
????$marker?=?$stmt->param_count;
????printf("Statement?has?%d?markers.\n",?$marker);
????/*?close?statement?*/
????$stmt->close();
}
/*?close?connection?*/
$mysqli->close();
?>Example #2 Procedural style
<?php
$link?=?mysqli_connect("localhost",?"my_user",?"my_password",?"world");
/*?check?connection?*/
if?(mysqli_connect_errno())?{
????printf("Connect?failed:?%s\n",?mysqli_connect_error());
????exit();
}
if?($stmt?=?mysqli_prepare($link,?"SELECT?Name?FROM?Country?WHERE?Name=??OR?Code=?"))?{
????$marker?=?mysqli_stmt_param_count($stmt);
????printf("Statement?has?%d?markers.\n",?$marker);
????/*?close?statement?*/
????mysqli_stmt_close($stmt);
}
/*?close?connection?*/
mysqli_close($link);
?>上面的例子会输出：
Statement has 2 markers.本文档系腾讯云开发者社区成员共同维护，如有问题请联系 cloudcommunity@tencent.com
