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mysqli_stmt::$param_count

mysqli_stmt_param_count

(PHP 5, PHP 7, PHP 8)

mysqli_stmt::$param_count -- mysqli_stmt_param_countReturns the number of parameters for the given statement

Açıklama

Nesne yönelimli kullanım

Yordamsal kullanım

mysqli_stmt_param_count(mysqli_stmt $statement): int

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

Bağımsız Değişkenler

deyim

Sadece yordamsal tarz: mysqli_stmt_init() işlevinden dönen bir mysqli_stmt nesnesi.

Dönen Değerler

Returns an integer representing the number of parameters.

Örnekler

Örnek 1 Nesne yönelimli kullanım

<?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();
?>

Örnek 2 Yordamsal kullanım

<?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);
?>

Yukarıdaki örneklerin çıktısı:

Statement has 2 markers.

Ayrıca Bakınız

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User Contributed Notes 1 note

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2
Senthryl
15 years ago
This parameter (and presumably any other parameter in mysqli_stmt) will raise an error with the message "Property access is not allowed yet" if the statement was not prepared properly, or not prepared at all.

To prevent this, always ensure that the return value of the "prepare" statement is true before accessing these properties.
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