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.
mysqli_stmt::$param_count
mysqli_stmt_param_count
(PHP 5, PHP 7, PHP 8)
mysqli_stmt::$param_count -- mysqli_stmt_param_count — Returns the number of parameters for the given statement
Açıklama
Nesne yönelimli kullanım
Yordamsal kullanım
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.
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User Contributed Notes 1 note
Senthryl ¶
15 years ago
