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    mysqli_stmt::$num_rows

    mysqli_stmt::num_rows

    mysqli_stmt_num_rows

    (PHP 5, PHP 7, PHP 8)

    mysqli_stmt::$num_rows -- mysqli_stmt::num_rows -- mysqli_stmt_num_rows — Retourne le nombre de lignes extraites du serveur

    Description

    Style orienté objet

    int|string $mysqli_stmt->num_rows;
    public mysqli_stmt::num_rows(): int|string

    Style procédural

    mysqli_stmt_num_rows(mysqli_stmt $statement): int|string

    Retourne le nombre de lignes mises en mémoire tampon dans l'instruction. Cette fonction ne fonctionnera qu'après l'appel de mysqli_stmt_store_result() pour mettre en mémoire tampon l'ensemble des résultats dans le handle de l'instruction.

    Cette fonction retourne 0 à moins que toutes les lignes aient été récupérées du serveur.

    Liste de paramètres

    statement

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

    Valeurs de retour

    Un entier représentant le nombre de lignes mises en mémoire tampon. Retourne 0 en mode non tamponné, sauf si toutes les lignes ont été récupérées du serveur.

    Note:

    Si le nombre de ligne est supérieur à PHP_INT_MAX, le nombre sera retourné en tant que chaîne de caractères.

    Exemples

    Exemple #1 Style orienté objet

    <?php

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

    $query = "SELECT Name, CountryCode FROM City ORDER BY Name LIMIT 20";

    $stmt = $mysqli->prepare($query);
    $stmt->execute();

    /* Stocker le résultat dans un tampon interne */
    $stmt->store_result();

    printf("Nombre de lignes : %d.\n", $stmt->num_rows);
    ?>

    Exemple #2 Style procédural

    <?php

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

    $query = "SELECT Name, CountryCode FROM City ORDER BY Name LIMIT 20";

    $stmt = mysqli_prepare($link, $query);
    mysqli_stmt_execute($stmt);

    /* Stocker le résultat dans un tampon interne */
    mysqli_stmt_store_result($stmt);

    printf("Nombre de lignes : %d.\n", mysqli_stmt_num_rows($stmt));
    ?>

    Les exemples ci-dessus vont afficher :

    Nombre de lignes : 20.

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    User Contributed Notes 1 note

    up
    89
    Typer85 at gmail dot com
    17 years ago
    Please be advised, for people who sometimes miss to read this important Manual entry for this function:

    If you do not use mysqli_stmt_store_result( ), and immediatley call this function after executing a prepared statement, this function will usually return 0 as it has no way to know how many rows are in the result set as the result set is not saved in memory yet.

    mysqli_stmt_store_result( ) saves the result set in memory thus you can immedietly use this function after you both execute the statement AND save the result set.

    If you do not save the result set but still want to use this function you have to actually loop through the result set one row at a time using mysqli_stmt_fetch( ) before using this function to determine the number of rows.

    A thought though, if you want to determine the number of rows without storing the result set and after looping through it, why not just simply keep an internal counter in your loop every time a row is fetched and save the function call.

    In short, this function is only really useful if you save the result set and want to determine the number of rows before looping through it, otherwise you can pretty much recreate its use like I suggested.
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