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DB_common::provides()

DB_common::provides() -- Checks if the DBMS supports a particular feature

Synopsis

boolean provides (string $feature)

Descripción

Checks if a feature is available for the chosen database type.

Parámetro

string $feature

the feature to check

Tabla 35-1. Possible values are:

$feature valueMeaning
prepare The database does a pre-check of the SQL statment
pconnect The database supports persistent connections
transactions The database supports transactions
limit The database supports LIMITed SELECT statments

Valor devuelto

boolean - TRUE if the feature is supported

Nota

Esta función no puede ser llamada estáticamente.

Aviso

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.

Ejemplo

Ejemplo 35-1. Using provides()

<?php
// Once you have a valid DB object named $db...
if ($db->provides('pconnect')) {
    echo "Persistent connections are allowed.\n";
}
?>
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DB_common::prepare()SubirDB_common::query()