You must call mysqli_stmt_store_result() for every query that successfully produces a result set (SELECT, SHOW, DESCRIBE, EXPLAIN), and only if you want to buffer the complete result set by the client, so that the subsequent mysqli_fetch() call returns buffered data.

Note: It is unnecessary to call mysqli_stmt_store_result() for other queries, but if you do, it will not harm or cause any notable performance in all cases. You can detect whether the query produced a result set by checking if mysqli_stmt_result_metadata() returns NULL.

Return values

Returns TRUE on success or FALSE on failure.

Example

Example 1. Object oriented style


<?php

/* Open a connection */

$mysqli = new mysqli("localhost", "my_user", "my_password", "world");



/* check connection */ 

if (mysqli_connect_errno()) {

    printf("Connect failed: %s\n", mysqli_connect_error());

    exit();

}



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

if ($stmt = $mysqli->prepare($query)) {



    /* execute query */

    $stmt->execute();



    /* store result */

    $stmt->store_result();



    printf("Number of rows: %d.\n", $stmt->num_rows);



    /* free result */

    $stmt->free_result();



    /* close statement */

    $stmt->close();

}



/* close connection */

$mysqli->close();

?>

Example 2. Procedural style


<?php

/* Open a connection */

$link = mysqli_connect("localhost", "my_user", "my_password", "world");



/* check connection */ 

if (mysqli_connect_errno()) {

    printf("Connect failed: %s\n", mysqli_connect_error());

    exit();

}



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

if ($stmt = mysqli_prepare($link, $query)) {



    /* execute query */

    mysqli_stmt_execute($stmt);



    /* store result */

    mysqli_stmt_store_result($stmt);



    printf("Number of rows: %d.\n", mysqli_stmt_num_rows($stmt));



    /* free result */

    mysqli_stmt_free_result($stmt);



    /* close statement */

    mysqli_stmt_close($stmt);

}



/* close connection */

mysqli_close($link);

?>

The above examples would produce the following output:

Number of rows: 20.

mysqli_stmt_store_result

Description

Return values

See also

Example