mysqli_stmt::num_rows
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)
mysqli_stmt->param_count -- mysqli_stmt_param_count — Returns the number of parameter for the given statement
Descripción
Estilo orientado a objetos
int $param_count;
Estilo por procesos
int mysqli_stmt::mysqli_stmt_param_count
( mysqli_stmt $stmt
)
Returns the number of parameter markers present in the prepared statement.
Parámetros
- stmt
-
Sólo estilo procedimental: Un identificador de declaraciones devuelto por mysqli_stmt_init().
Valores devueltos
Returns an integer representing the number of parameters.
Ejemplos
Example #1 Estilo orientado a objetos
<?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 Estilo por procesos
<?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);
?>
El resultado de los ejemplos serían:
Statement has 2 markers.
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User Contributed Notes
mysqli_stmt->param_count
Senthryl
10-Mar-2009 07:47