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PHP5中文手册
mysqli
PHP Manual

mysqli_stmt_param_count

stmt->param_count

(No version information available, might be only in CVS)

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

说明

Procedural style:

int mysqli_stmt_param_count ( mysqli_stmt $stmt )

Object oriented style (property):

mysqli_stmt
int$param_count;

Returns the number of parameter markers present in the prepared statement.

参数

stmt

Procedural style only: A statement identifier returned by mysqli_stmt_init().

返回值

Returns an integer representing the number of parameters.

范例

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);
?>

上例将输出：

Statement has 2 markers.

参见

mysqli
PHP Manual