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
Warning
This extension is deprecated as of PHP 5.5.0, and will be removed in the future. Instead, the MySQLi or PDO_MySQL extension should be used. See also MySQL: choosing an API guide and related FAQ for more information. Alternatives to this function include:
- SQL Query: SHOW DATABASES
說明
resource mysql_list_dbs
([ resource
$link_identifier = NULL
] )Returns a result pointer containing the databases available from the current mysql daemon.
Warning
自PHP 5.4.0起，此函式已經被廢棄。強烈建議不要使用此函式。
參數
-
link_identifier -
MySQL 的連接識別符。如果沒有指定，預設使用最後被 mysql_connect() 打開的連接。如果沒有找到該連接，函式會嘗試呼叫 mysql_connect() 建立連接並使用它。如果發生意外，沒有找到連接或無法建立連接，系統發出
E_WARNING級別的警告信息。
回傳值
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().
範例
Example #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 $row->Database . "\n";
}
?>
上例的輸出類似於：
database1 database2 database3
註釋
Note:
為了保證向前相容，可以使用下面的別名，但不贊成使用它： mysql_listdbs()
參見
- mysql_db_name() - Retrieves database name from the call to mysql_list_dbs
- mysql_select_db() - Select a MySQL database
add a note
User Contributed Notes 4 notes
jeff at forerunnertv dot com ¶
3 years ago
busilezas at gmail dot com ¶
9 years ago
The example is wrong in Spanish version.
ERROR: mysql_fetch_assoc() expects parameter 1 to be resource, null given in XXX on line 5
while ($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.
