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DB_common::provides()
Вернуться к: DB
DB_common::provides()
DB_common::provides() – Checks if the DBMS supports a particular feature
Synopsis
boolean provides ( string $feature )
Checks if a feature is available for the chosen database type.
Parameter
- string $feature
-
the feature to check
Possible values are: $feature value Meaning prepare The database does a pre-check of the SQL statement pconnect The database supports persistent connections transactions The database supports transactions limit The database supports LIMITed SELECT statements
Return value
boolean - TRUE if the feature is supported
Note
This function can not be called statically.
The provided information are only hints. Check the documentation of your database system for the real supported features. I.e. MySQL supports transactions, but not for every table type.
Example
Using provides()
<?php
// Once you have a valid DB object named $db...
if ($db->provides('pconnect')) {
echo "Persistent connections are allowed.\n";
}
?> Вернуться к: DB