PHP Manual
mysqli
Transfers a result set from the last query

mysqli::store_result

mysqli_store_result

(PHP 5, PHP 7, PHP 8)

mysqli::store_result -- mysqli_store_result — Transfers a result set from the last query

Beschreibung

Objektorientierter Stil

public mysqli::store_result(int $mode = 0): mysqli_result|false

Prozeduraler Stil

mysqli_store_result(mysqli $mysql, int $mode = 0): mysqli_result|false

Transfers the result set from the last query on the database connection represented by the mysql parameter to be used with the mysqli_data_seek() function.

Parameter-Liste

mysql

Nur bei prozeduralem Aufruf: Ein von mysqli_connect() oder mysqli_init() zurückgegebenes mysqli-Objekt.

mode

The option that you want to set. It can be one of the following values:

**Valid options**
Name	Description
`MYSQLI_STORE_RESULT_COPY_DATA`	Copy results from the internal mysqlnd buffer into the PHP variables fetched. By default, mysqlnd will use a reference logic to avoid copying and duplicating results held in memory. For certain result sets, for example, result sets with many small rows, the copy approach can reduce the overall memory usage because PHP variables holding results may be released earlier (available with mysqlnd only)

Rückgabewerte

Returns a buffered result object or false if an error occurred.

Hinweis:
mysqli_store_result() returns false in case the query didn't return a result set (if the query was, for example an INSERT statement). This function also returns false if the reading of the result set failed. You can check if you have got an error by checking if mysqli_error() doesn't return an empty string, if mysqli_errno() returns a non zero value, or if mysqli_field_count() returns a non zero value. Also possible reason for this function returning false after successful call to mysqli_query() can be too large result set (memory for it cannot be allocated). If mysqli_field_count() returns a non-zero value, the statement should have produced a non-empty result set.

Beispiele

See mysqli_multi_query().

Anmerkungen

Hinweis:
Although it is always good practice to free the memory used by the result of a query using the mysqli_free_result() function, when transferring large result sets using the mysqli_store_result() this becomes particularly important.