mysqli::$warning_count

mysqli_warning_count

(PHP 5)

mysqli::$warning_count -- mysqli_warning_count — Returns the number of warnings from the last query for the given link

Descrizione

Stile orientato agli oggetti

int $mysqli->warning_count;

Stile procedurale

int mysqli_warning_count ( mysqli $link )

Returns the number of warnings from the last query in the connection.

Nota:
For retrieving warning messages you can use the SQL command SHOW WARNINGS [limit row_count].

Elenco dei parametri

link: Solo nello stile procedurale: un identificatore restituito da mysqli_connect() o mysqli_init()

Valori restituiti

Number of warnings or zero if there are no warnings.

Esempi

Example #1 $mysqli->warning_count example

Stile orientato agli oggetti


<?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();
}

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

/* a remarkable city in Wales */
$query = "INSERT INTO myCity (CountryCode, Name) VALUES('GBR',
        'Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch')";

$mysqli->query($query);

if ($mysqli->warning_count) {
    if ($result = $mysqli->query("SHOW WARNINGS")) {
        $row = $result->fetch_row();
        printf("%s (%d): %s\n", $row[0], $row[1], $row[2]);
        $result->close();
    }
}

/* close connection */
$mysqli->close();
?>

Stile procedurale


<?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();
}

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

/* a remarkable long city name in Wales */
$query = "INSERT INTO myCity (CountryCode, Name) VALUES('GBR',
        'Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch')";

mysqli_query($link, $query);

if (mysqli_warning_count($link)) {
    if ($result = mysqli_query($link, "SHOW WARNINGS")) {
        $row = mysqli_fetch_row($result);
        printf("%s (%d): %s\n", $row[0], $row[1], $row[2]);
        mysqli_free_result($result);
    }
}

/* close connection */
mysqli_close($link);
?>

I precedenti esempi visualizzeranno:

Warning (1264): Data truncated for column 'Name' at row 1

Vedere anche:

mysqli_errno() - Returns the error code for the most recent function call
mysqli_error() - Returns a string description of the last error
mysqli_sqlstate() - Returns the SQLSTATE error from previous MySQL operation

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