There is no direct equivalent of mysql_list_dbs() as a mysqli_list_dbs() command, but you can query "show databases" instead.
So this:
$db_list = mysql_list_dbs($connect); //mysql
Is equivalent to this:
$db_list = mysqli_query($connect, "SHOW DATABASES"); //mysqli
mysql_list_dbs
(PHP 4, PHP 5)
mysql_list_dbs — List databases available on a MySQL server
Увага
This function was deprecated in PHP 5.4.0, and it and the entire original MySQL extension was removed in PHP 7.0.0. Instead, use either the actively developed MySQLi or PDO_MySQL extensions. See also the MySQL: choosing an API guide and its related FAQ entry for additional information. Alternatives to this function include:
- SQL Query: SHOW DATABASES
Опис
resource mysql_list_dbs
([ resource
$link_identifier = NULL
] )Returns a result pointer containing the databases available from the current mysql daemon.
Параметри
-
link_identifier -
The MySQL connection. If the link identifier is not specified, the last link opened by mysql_connect() is assumed. If no such link is found, it will try to create one as if mysql_connect() was called with no arguments. If no connection is found or established, an
E_WARNINGlevel error is generated.
Значення, що повертаються
Returns a result pointer resource on success, or FALSE on
failure. Use the mysql_tablename() function to traverse
this result pointer, or any function for result tables, such as
mysql_fetch_array().
Приклади
Приклад #1 mysql_list_dbs() example
<?php
// Usage without mysql_list_dbs()
$link = mysql_connect('localhost', 'mysql_user', 'mysql_password');
$res = mysql_query("SHOW DATABASES");
while ($row = mysql_fetch_assoc($res)) {
echo $row['Database'] . "\n";
}
// Deprecated as of PHP 5.4.0
$link = mysql_connect('localhost', 'mysql_user', 'mysql_password');
$db_list = mysql_list_dbs($link);
while ($row = mysql_fetch_object($db_list)) {
echo $row->Database . "\n";
}
?>
Наведений вище приклад виведе щось подібне до:
database1 database2 database3
Примітки
Зауваження:
Для зворотньої сумісності, можна використовувати наступний застарівший псевдонім: mysql_listdbs()
Прогляньте Також
- mysql_db_name() - Retrieves database name from the call to mysql_list_dbs
- mysql_select_db() - Select a MySQL database
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User Contributed Notes 4 notes
jeff at forerunnertv dot com ¶
3 years ago
busilezas at gmail dot com ¶
9 years ago
The example is wrong in Spanish version.
ERROR: mysql_fetch_assoc() expects parameter 1 to be resource, null given in XXX on line 5
while ($fila = mysql_fetch_assoc($res)) {
OK.
while ($fila = mysql_fetch_assoc($resultado)) {
matjung at hotmail dot com ¶
14 years ago
The result pointer contains only the databases for which the mysql_user has the select priviledge granted.
