mysqli_result::fetch_assoc
mysqli_fetch_assoc
(PHP 5, PHP 7, PHP 8)
mysqli_result::fetch_assoc -- mysqli_fetch_assoc — Fetch the next row of a result set as an associative array
Beschreibung
Objektorientierter Stil
Prozeduraler Stil
Fetches one row of data from the result set and returns it as an associative
array.
Each subsequent call to this function will return the next row within the
result set, or null if there are no more rows.
If two or more columns of the result have the same name, the last column will take precedence and overwrite any previous data. To access multiple columns with the same name, mysqli_fetch_row() may be used to fetch the numerically indexed array, or aliases may be used in the SQL query select list to give columns different names.
Hinweis: Feldnamen, die von dieser Funktion zurückgegeben werden, unterscheiden sich in der Groß-/Kleinschreibung.
Hinweis: Diese Funktion setzt NULL-Felder auf den PHP Wert-
null.
Parameter-Liste
-
result -
Nur bei prozeduralem Aufruf: Ein von mysqli_query(), mysqli_store_result(), mysqli_use_result() oder mysqli_stmt_get_result() zurückgegebenes mysqli_result-Objekt.
Rückgabewerte
Returns an associative array representing the fetched row,
where each key in the array represents the name of one of the result
set's columns, null if there
are no more rows in the result set, Bei einem Fehler wird false zurückgegeben..
Beispiele
Beispiel #1 mysqli_result::fetch_assoc() example
Objektorientierter Stil
<?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 ID DESC";
$result = $mysqli->query($query);
/* fetch associative array */
while ($row = $result->fetch_assoc()) {
printf("%s (%s)\n", $row["Name"], $row["CountryCode"]);
}
Prozeduraler Stil
<?php
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$mysqli = mysqli_connect("localhost", "my_user", "my_password", "world");
$query = "SELECT Name, CountryCode FROM City ORDER BY ID DESC";
$result = mysqli_query($mysqli, $query);
/* fetch associative array */
while ($row = mysqli_fetch_assoc($result)) {
printf("%s (%s)\n", $row["Name"], $row["CountryCode"]);
}
Die oben gezeigten Beispiele erzeugen eine ähnliche Ausgabe wie:
Pueblo (USA) Arvada (USA) Cape Coral (USA) Green Bay (USA) Santa Clara (USA)
Beispiel #2 Comparison of mysqli_result iterator and mysqli_result::fetch_assoc() usage
mysqli_result can be iterated using foreach. The result set will always be iterated from the first row, regardless of the current position.
<?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 ID DESC';
// Using iterators
$result = $mysqli->query($query);
foreach ($result as $row) {
printf("%s (%s)\n", $row["Name"], $row["CountryCode"]);
}
echo "\n==================\n";
// Not using iterators
$result = $mysqli->query($query);
while ($row = $result->fetch_assoc()) {
printf("%s (%s)\n", $row["Name"], $row["CountryCode"]);
}
Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:
Pueblo (USA) Arvada (USA) Cape Coral (USA) Green Bay (USA) Santa Clara (USA) ================== Pueblo (USA) Arvada (USA) Cape Coral (USA) Green Bay (USA) Santa Clara (USA)
Siehe auch
- mysqli_fetch_array() - Fetch the next row of a result set as an associative, a numeric array, or both
- mysqli_fetch_column() - Fetch a single column from the next row of a result set
- mysqli_fetch_row() - Fetch the next row of a result set as an enumerated array
- mysqli_fetch_object() - Fetch the next row of a result set as an object
- mysqli_query() - Performs a query on the database
- mysqli_data_seek() - Adjusts the result pointer to an arbitrary row in the result
