Related content about PHP database ODBC

PHP database ODBC is more important in the PHP database, so this article will explain the relevant knowledge of PHP database ODBC in detail.

ODBC is an applicationProgrammingInterface (Application Programming Interface, API) that enables us to connect to a data source (such as an MS Access database ).

Create an ODBC connection

With an ODBC connection, you can connect to any database on any computer in your network, as long as the ODBC connection is available.

This is how to create an ODBC connection to an MS Access database:

Open the Administrative Tools icon in Control Panel.

Double-click the data source (ODBC) icon.

Select the System DSN tab.

Click Add in the System DSN tab.

Select Microsoft Access Driver. Click Done.

On the next interface, click Select to locate the database.

Give a data source name (DSN) to the database.

Click OK.

Please note that this configuration must be completed on the computer where your website is located. If your computer is running Internet Information Services (IIS), the above instructions will work, but if your website is on a remote server, you must have physical access to the server or ask your hosting provider to provide it for you. Create DSN.

Connect to ODBC

odbc_connect() Function Used to connect to ODBC data sources. This function has four parameters: data source name, user name, password, and optional pointer type.

The odbc_exec() function is used to execute SQL statements.

Example

The following example creates a connection to a DSN named northwind without a username and password. Then create and execute a SQL statement:

$conn=odbc_connect('northwind','','');$sql="SELECT * FROM customers";$rs=odbc_exec($conn,$sql);

Fetch records

The odbc_fetch_row() function is used to return records from the result set. The function returns true if rows can be returned, false otherwise.

This function has two parameters: ODBC result identifier and optional row number:

odbc_fetch_row($rs)

Retrieve fields from records

odbc_result() function is used to retrieve fields from records Read fields from the record. This function takes two parameters: the ODBC result identifier and the field number or name.

The following line of code returns the value of the first field from the record:

$compname=odbc_result($rs,1);

The following line of code returns the value of the field named "CompanyName":

$compname=odbc_result($rs,"CompanyName");

Close the ODBC connection

odbc_close() function is used to close the ODBC connection.

odbc_close($conn);

ODBC Example

The following example shows how to first create a database connection, then create a result set, and then display the data in an HTML table.

";echo "Companyname";echo "Contactname";while (odbc_fetch_row($rs)){    $compname=odbc_result($rs,"CompanyName");    $conname=odbc_result($rs,"ContactName");    echo "$compname";    echo "$conname";}odbc_close($conn);echo "";?>

This article explains the relevant knowledge of PHP database ODBC in detail. For more learning materials, please pay attention to the PHP Chinese website.

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