mysqli_stmt_param_count

(PHP 5)

mysqli_stmt_param_count

(no version information, might be only in CVS)

stmt->param_count -- Returns the number of parameter for the given statement

Description

Procedural style:

int mysqli_stmt_param_count ( mysqli_stmt stmt )

Object oriented style (property):

class mysqli_stmt {

int param_count

}

mysqli_stmt_param_count() returns the number of parameter markers present in the prepared statement.

返回值

returns an integer representing the number of parameters.

参见

mysqli_prepare().

例子 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();
?>

例子 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);
?>

上例将输出:

Statement has 2 markers.