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<p>mysqli_change_user
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<p><a href="function.mysqli-bind-result.html">Пред.</a>
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<p><h1><a name="function.mysqli-change-user"></a>mysqli_change_user</h1><div><a name="AEN97690"></a>
<p>(PHP 5)mysqli_change_user
<p>(no version information, might be only in CVS)mysqli-&#62;change_user -- Changes the user of the specified database connection</div><div><a name="AEN97694"></a><h2>Description</h2>
<p>Procedural style:bool mysqli_change_user (mysqli link, string user, string password, string database)
<p>Object oriented style (method):class <B CLASS="classname">mysqli {
<p>bool change_user (string user, string password, string database)
<p>}
<p>- mysqli_change_user() is used to change the user of the specified
<p>database connection as given by the <VAR CLASS="parameter">link parameter and to set the
<p>current database to that specified by the <VAR CLASS="parameter">database parameter.
<p>- If desired, the <TT CLASS="constant">NULL value may be passed in place of the <VAR CLASS="parameter">database
<p>parameter resulting in only changing the user and not selecting a database. To select
<p>a database in this case use the <a href="function.mysqli-select-db.html">mysqli_select_db()</a> function.
<p>- In order to successfully change users a valid <VAR CLASS="parameter">username and
<p><VAR CLASS="parameter">password parameters must be provided and that user must have
<p>sufficient permissions to access the desired database. If for any reason authorization
<p>fails, the current user authentication will remain.
<p><DIV><BLOCKQUOTE>
<p>Замечание:
<p>Using this command will always cause the current database connection to behave as if
<p>was a completely new database connection, regardless of if the operation was completed
<p>successfully. This reset includes performing a rollback on any active transactions,
<p>closing all temporary tables, and unlocking all locked tables.
<p></BLOCKQUOTE></div></div><div><a name="AEN97741"></a><h2>Возвращаемые значения</h2>
<p>- Возвращает <TT CLASS="constant">TRUE в случае успешного завершения или <TT CLASS="constant">FALSE в случае возникновения ошибки.
<p></div><div><a name="AEN97746"></a><h2>Смотрите также</h2>
<p>- <a href="function.mysqli-connect.html">mysqli_connect()</a> и
<p><a href="function.mysqli-select-db.html">mysqli_select_db()</a>.
<p></div><div><a name="AEN97751"></a><h2>Примеры</h2><table><tr><td><DIV><a name="AEN97753"></a>
<p>Пример 1. Object oriented style<table><tr><td><code>
<p>&lt;?php
<p>
<p>/* connect database test */
<p>$mysqli = new mysqli("localhost", "my_user", "my_password", "test");
<p>
<p>/* check connection */
<p>if (mysqli_connect_errno()) {
<p>printf("Connect failed: %s\n", mysqli_connect_error());
<p>exit();
<p>}
<p>
<p>/* Set Variable a */
<p>$mysqli->query("SET @a:=1");
<p>
<p>/* reset all and select a new database */
<p>$mysqli->change_user("my_user", "my_password", "world");
<p>
<p>if ($result = $mysqli->query("SELECT DATABASE()")) {
<p>$row = $result->fetch_row();
<p>printf("Default database: %s\n", $row[0]);
<p>$result->close();
<p>}
<p>
<p>if ($result = $mysqli->query("SELECT @a")) {
<p>$row = $result->fetch_row();
<p>if ($row[0] === NULL) {
<p>printf("Value of variable a is NULL\n");
<p>}
<p>$result->close();
<p>}
<p>
<p>/* close connection */
<p>$mysqli->close();
<p>?>
<p>
<p></code></TABLE></div></TABLE><table><tr><td><DIV><a name="AEN97756"></a>
<p>Пример 2. Procedural style<table><tr><td><code>
<p>&lt;?php
<p>/* connect database test */
<p>$link = mysqli_connect("localhost", "my_user", "my_password", "test");
<p>
<p>/* check connection */
<p>if (!$link) {
<p>printf("Connect failed: %s\n", mysqli_connect_error());
<p>exit();
<p>}
<p>
<p>/* Set Variable a */
<p>mysqli_query($link, "SET @a:=1");
<p>
<p>/* reset all and select a new database */
<p>mysqli_change_user($link, "my_user", "my_password", "world");
<p>
<p>if ($result = mysqli_query($link, "SELECT DATABASE()")) {
<p>$row = mysqli_fetch_row($result);
<p>printf("Default database: %s\n", $row[0]);
<p>mysqli_free_result($result);
<p>}
<p>
<p>if ($result = mysqli_query($link, "SELECT @a")) {
<p>$row = mysqli_fetch_row($result);
<p>if ($row[0] === NULL) {
<p>printf("Value of variable a is NULL\n");
<p>}
<p>mysqli_free_result($result);
<p>}
<p>
<p>/* close connection */
<p>mysqli_close($link);
<p>?>
<p>
<p></code></TABLE></div></TABLE>
<p>Результат выполнения данного примера:<table><tr><td><PRE>Default database: world
<p>Value of variable a is NULL</PRE></TABLE></div>
<p><a href="function.mysqli-bind-result.html">Пред.</a>
<p><a href="index.html">Начало</a>
<p><a href="function.mysqli-character-set-name.html">След.</a>
<p>mysqli_bind_result
<p><a href="ref.mysqli.html">Уровень выше</a>
<p>mysqli_character_set_name
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