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mysqli_stmt::execute

mysqli_stmt_execute

(PHP 5, PHP 7, PHP 8)

mysqli_stmt::execute -- mysqli_stmt_executeExécute une requête préparée

Description

Style orienté objet

public mysqli_stmt::execute(?array $params = null): bool

Style procédural

mysqli_stmt_execute(mysqli_stmt $statement, ?array $params = null): bool

Exécute une requête qui a été préalablement préparée en utilisant la fonction mysqli_prepare(), grâce à la ressource stmt. Lors de l'exécution, toutes les variables de la requête seront remplacées par les données appropriées.

Si la requête est UPDATE, DELETE, ou INSERT, le nombre total de lignes affectées est disponible via la fonction mysqli_stmt_affected_rows(). Si la requête produit un ensemble de résultats, il peut être récupéré à l'aide de la fonction mysqli_stmt_get_result() ou en le récupérant ligne par ligne directement à partir de l'instruction à l'aide de la fonction mysqli_stmt_fetch().

Liste de paramètres

statement

Style procédural uniquement : Un objet mysqli_stmt retourné par la fonction mysqli_stmt_init().

params

Une liste facultative, en tant que tableau, avec autant d'éléments qu'il y a de paramètres liés dans l'instruction SQL en cours d'exécution. Chaque valeur est traitée comme une chaîne de caractères.

Valeurs de retour

Cette fonction retourne true en cas de succès ou false si une erreur survient.

Erreurs / Exceptions

Si le rapport d'erreurs mysqli est activé (MYSQLI_REPORT_ERROR) et que l'opération demandée échoue, un avertissement est généré. Si, en plus, le mode est défini sur MYSQLI_REPORT_STRICT, une mysqli_sql_exception est lancée à la place.

Historique

Version Description
8.1.0 Le paramètre facultatif params a été ajouté.

Exemples

Exemple #1 Exécuter une instruction préparée avec des variables liées

Style orienté objet

<?php

mysqli_report
(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");

$mysqli->query("CREATE TEMPORARY TABLE myCity LIKE City");

/* Préparation de la requête */
$stmt = $mysqli->prepare("INSERT INTO myCity (Name, CountryCode, District) VALUES (?,?,?)");

/* Lier les variables aux paramètres */
$stmt->bind_param("sss", $val1, $val2, $val3);
$val1 = 'Stuttgart';
$val2 = 'DEU';
$val3 = 'Baden-Wuerttemberg';

/* Exécuter l'instruction */
$stmt->execute();
$val1 = 'Bordeaux';
$val2 = 'FRA';
$val3 = 'Aquitaine';

/* Exécuter l'instruction */
$stmt->execute();

/* Récupération de toutes les lignes de myCity */
$query = "SELECT Name, CountryCode, District FROM myCity";
$result = $mysqli->query($query);
while (
$row = $result->fetch_row()) {
printf("%s (%s,%s)\n", $row[0], $row[1], $row[2]);
}

Style procédural

<?php

mysqli_report
(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$link = mysqli_connect("localhost", "my_user", "my_password", "world");

mysqli_query($link, "CREATE TEMPORARY TABLE myCity LIKE City");

/* Préparation de la requête */
$stmt = mysqli_prepare($link, "INSERT INTO myCity (Name, CountryCode, District) VALUES (?,?,?)");

/* Lier les variables aux paramètres */
mysqli_stmt_bind_param($stmt, "sss", $val1, $val2, $val3);
$val1 = 'Stuttgart';
$val2 = 'DEU';
$val3 = 'Baden-Wuerttemberg';

/* Exécuter l'instruction */
mysqli_stmt_execute($stmt);
$val1 = 'Bordeaux';
$val2 = 'FRA';
$val3 = 'Aquitaine';

/* Exécuter l'instruction */
mysqli_stmt_execute($stmt);

/* Récupération de toutes les lignes de myCity */
$query = "SELECT Name, CountryCode, District FROM myCity";
$result = mysqli_query($link, $query);
while (
$row = mysqli_fetch_row($result)) {
printf("%s (%s,%s)\n", $row[0], $row[1], $row[2]);
}

Les exemples ci-dessus vont afficher :

Stuttgart (DEU,Baden-Wuerttemberg)
Bordeaux (FRA,Aquitaine)

Exemple #2 Exécuter une instruction préparée avec un tableau de valeurs

Style orienté objet

<?php

mysqli_report
(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$mysqli = new mysqli('localhost', 'my_user', 'my_password', 'world');

$mysqli->query('CREATE TEMPORARY TABLE myCity LIKE City');

/* Préparation de la requête */
$stmt = $mysqli->prepare('INSERT INTO myCity (Name, CountryCode, District) VALUES (?,?,?)');

/* Exécuter l'instruction */
$stmt->execute(['Stuttgart', 'DEU', 'Baden-Wuerttemberg']);

/* Récupération de toutes les lignes de myCity */
$query = 'SELECT Name, CountryCode, District FROM myCity';
$result = $mysqli->query($query);
while (
$row = $result->fetch_row()) {
printf("%s (%s,%s)\n", $row[0], $row[1], $row[2]);
}

Style procédural

<?php

mysqli_report
(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$link = mysqli_connect('localhost', 'my_user', 'my_password', 'world');

mysqli_query($link, 'CREATE TEMPORARY TABLE myCity LIKE City');

/* Préparation de la requête */
$stmt = mysqli_prepare($link, 'INSERT INTO myCity (Name, CountryCode, District) VALUES (?,?,?)');

/* Exécuter l'instruction */
mysqli_stmt_execute($stmt, ['Stuttgart', 'DEU', 'Baden-Wuerttemberg']);

/* Récupération de toutes les lignes de myCity */
$query = 'SELECT Name, CountryCode, District FROM myCity';
$result = mysqli_query($link, $query);
while (
$row = mysqli_fetch_row($result)) {
printf("%s (%s,%s)\n", $row[0], $row[1], $row[2]);
}

Les exemples ci-dessus vont afficher :

Stuttgart (DEU,Baden-Wuerttemberg)

Voir aussi

add a note

User Contributed Notes 2 notes

up
14
Typer85 at gmail dot com
17 years ago
Just to clarify this note in the Manual regarding this function:

"Note: When using mysqli_stmt_execute(), the mysqli_stmt_fetch() function must be used to fetch the data prior to performing any additional queries."

This is because this function DOES NOT store the result set on the client side so you have to fetch everything in the result set or else you risk major errors.

If you however use the function mysqli_stmt_store_result immediately after you use this function, you are forcing the result set to be stored on the client side and thus it is safe to issue extra queries before fetching all the data.

This is where you really have to make a choice regarding on your application's priorities. If you know your result set is memory hefty, then its a good idea not to store it on the client side so you don't run in any errors regarding unavailable memory on the server. But this also means your not going to do a lot of calculations on the result set or else you will prevent any other usage of the table to which the result set came from until you fetched it all.

If your going to do a lot of calculations or your result set is not memory hefty, its probably a good idea to store it on the client side.

Most of these problems can easily be solved if you have a lot of memory available on your server but thats usually not the case for those on shared hosting.

An intelligent way to counter this problem if your on a shared host is to be smart in the way you design your queries. Try to limit the result set if you know you will be fetching memory hefty result sets.

Test different alternatives for your application and see what works best for you under different conditions.

Good Luck,
up
-19
andrey at php dot net
18 years ago
If you select LOBs use the following order of execution or you risk mysqli allocating more memory that actually used

1)prepare()
2)execute()
3)store_result()
4)bind_result()

If you skip 3) or exchange 3) and 4) then mysqli will allocate memory for the maximal length of the column which is 255 for tinyblob, 64k for blob(still ok), 16MByte for MEDIUMBLOB - quite a lot and 4G for LONGBLOB (good if you have so much memory). Queries which use this order a bit slower when there is a LOB but this is the price of not having memory exhaustion in seconds.
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