Php warning: php startup: unable to load dynamic library ‘oci8_19’

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When receiving the “PHP Warning: PHP Startup: Unable to load dynamic library ‘oci8_19′” error, it means that PHP is unable to load the OCI8 extension which is used for connecting to Oracle databases. This error usually occurs when the OCI8 extension is not installed or properly configured.

To fix this issue, follow the steps below:

  1. Check OCI8 Extension Installation: Make sure that the OCI8 extension is installed on your PHP server. You can check it by creating a PHP file with the following code snippet:

    <?php
phpinfo();
?>

    Access this file in your browser and search for the OCI8 section. If the OCI8 section is missing, you need to install the OCI8 extension.

  2. Install OCI8 Extension: The process of installing OCI8 varies depending on your operating system and PHP version. Here are a few examples:

    • For Windows: Download the appropriate OCI8 extension DLL file based on your PHP version and architecture from the Oracle website. Extract the DLL file and copy it to the PHP extension directory (e.g., “C:\PHP\ext”). Then, open your “php.ini” file and uncomment the line that signifies loading the OCI8 extension (e.g., remove the semicolon before “extension=oci8_19”).
    • For Linux: Use the package manager of your Linux distribution to install the OCI8 extension. For example, on Ubuntu, you can run the following command: sudo apt-get install php-oci8. After the installation, restart PHP-FPM or Apache web server.

    After installing the OCI8 extension, make sure to restart your web server to apply the changes.

  3. Verify Configuration: Double-check that the OCI8 configuration is correctly set in your “php.ini” file. Look for the following lines and adjust them as necessary:

    extension_dir = "ext"
extension=oci8_19

    Make sure the “extension_dir” points to the correct PHP extension directory and the “extension” matches the OCI8 extension file name you installed.

  4. Test OCI8 Connection: Finally, you can test if the OCI8 extension is working properly by creating a basic PHP script to connect to an Oracle database:

    <?php
$conn = oci_connect('username', 'password', 'hostname/service_name');
if ($conn) {
    echo 'Connected to Oracle successfully.';
} else {
    $error = oci_error();
    echo 'Oracle connection error: ' . $error['message'];
}
?>

    Replace ‘username’, ‘password’, ‘hostname’, and ‘service_name’ with your Oracle database credentials. If the script successfully connects to the database without any errors, it means that OCI8 is properly installed and functioning.

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