How to call three databases with PHP (3)_PHP tutorial
Oracle is the world's most popular relational database. It is a powerful engine of industrialization promoted by large companies. Let’s take a look at its related functions first:
(1) integer ora_logon (string user, string password)
Start a connection to an Oracle database server.
(2)integer ora_open(integer connection)
Open the cursor of the given connection.
(3)integer ora_do(integer connection, string query)
Execute the query on the given connection. PHP generates an indicator, parses the query, and executes it.
(4)integer ora_parse(integer cursor, string query)
Parse a query and prepare it for execution.
(5) boolean ora_exec(integer cursor)
Execute a query previously parsed by the ora_parse function.
(6) boolean ora_fetch(integer cursor)
This function will cause the rows in an executed query to be fetched into the indicator. This allows you to call the ora_getcolumn function.
(7) string ora_getcolumn(integer cursor, integer column)
Return the current value. Column zero-based numeric index.
(8) boolean ora_logoff(integer connection)
Disconnect the link to the database server.
The following is a sample program to insert data into the ORACLE database:
//Set first Two environment variables ORACLE_HOME, ORACLE_SID
putenv("ORACLE_HOME=/oracle/app/oracle/product/8.0.4");
putenv("ORACLE_SID=ora8");
//Set the web page to display Chinese
putenv("NLS_LANG=Simplified_Chinese.zhs16cgb231280");
if($connection=ora_logon("scott","tiger")) {
//Library table test has three items: ID, name, and Description
$sql = 'insert into test(ID, name, Description) values ';
$sql .= '('' . $ID . '','' . $name . '',''. $Description . '')';
if($cursor=ora_do($connect,$ sql)) {
print("insert finished!");
}
$query = 'select * from test';
if( $cursor=ora_do($connect,$query)) {
ora_fetch($cursor);
$content0=ora_getcolumn($cursor,0);
$content1 =ora_getcolumn($cursor,1);
$content2=ora_getcolumn($cursor,2);
print("$content0");
print("$ content1");
print("$content2");
ora_close($cursor);
}
ora_logoff($connection);
}
?>

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