Description

Procedural style:mixed mysqli_query (mysqli link, string query [, int resultmode])

Object oriented style (method):class mysqli {

mixed query (string query [, int resultmode])

}

- The mysqli_query() function is used to simplify the

act of performing a query against the database represented by the

link parameter.

- Functionally, using this

function is identical to calling mysqli_real_query()

followed either by mysqli_use_result() or

mysqli_store_result() where query

is the query string itself and resultmode is

either the constant MYSQLI_USE_RESULT or

MYSQLI_STORE_RESULT depending

on the desired behavior. By default, if the

resultmode is not provided

MYSQLI_STORE_RESULT is used.

- If you execute mysqli_query() with resultmode

MYSQLI_USE_RESULT all subsequent calls will return error

Commands out of sync unless you call mysqli_free_result().

Примеры Пример 1. Object oriented style <?php $mysqli = new mysqli("localhost", "my_user", "my_password", "world"); /* check connection */ if (mysqli_connect_errno()) { printf("Connect failed: %s\n", mysqli_connect_error()); exit(); } /* Create table doesn't return a resultset */ if ($mysqli->query("CREATE TEMPORARY TABLE myCity LIKE City") === TRUE) { printf("Table myCity successfully created.\n"); } /* Select queries return a resultset */ if ($result = $mysqli->query("SELECT Name FROM City LIMIT 10")) { printf("Select returned %d rows.\n", $result->num_rows); /* free result set */ $result->close(); } /* If we have to retrieve large amount of data we use MYSQLI_USE_RESULT */ if ($result = $mysqli->query("SELECT * FROM City", MYSQLI_USE_RESULT)) { /* Note, that we can't execute any functions which interact with the server until result set was closed. All calls will return an 'out of sync' error */ if (!$mysqli->query("SET @a:='this will not work'")) { printf("Error: %s\n", $mysqli->error); } $result->close(); } $mysqli->close(); ?> Пример 2. Procedural style <?php $link = mysqli_connect("localhost", "my_user", "my_password", "world"); /* check connection */ if (mysqli_connect_errno()) { printf("Connect failed: %s\n", mysqli_connect_error()); exit(); } /* Create table doesn't return a resultset */ if (mysqli_query($link, "CREATE TEMPORARY TABLE myCity LIKE City") === TRUE) { printf("Table myCity successfully created.\n"); } /* Select queries return a resultset */ if ($result = mysqli_query($link, "SELECT Name FROM City LIMIT 10")) { printf("Select returned %d rows.\n", mysqli_num_rows($result)); /* free result set */ mysqli_free_result($result); } /* If we have to retrieve large amount of data we use MYSQLI_USE_RESULT */ if ($result = mysqli_query($link, "SELECT * FROM City", MYSQLI_USE_RESULT)) { /* Note, that we can't execute any functions which interact with the server until result set was closed. All calls will return an 'out of sync' error */ if (!mysqli_query($link, "SET @a:='this will not work'")) { printf("Error: %s\n", mysqli_error($link)); } mysqli_free_result($result); } mysqli_close($link); ?> Результат выполнения данного примера:Table myCity successfully created. Select returned 10 rows. Error: Commands out of sync; You can't run this command now

mysqli_query

Description

Возвращаемые значения

Смотрите также

Примеры