How to Install and Use the PDO Driver with PHP Docker Images?

Using PDO Driver with PHP Docker Image

Encountering errors in accessing a database using the PDO driver suggests a missing extension. Here's how to address this issue in a PHP Docker image:

The PHP Docker image doesn't include the MySQL extension by default. To install it:

1. Build Custom Docker Image:

   • Create a custom Dockerfile based on the official PHP image (e.g., php:5.6-apache).

   • Add the following line to install the PDO and MySQL extensions:

     RUN docker-php-ext-install pdo pdo_mysql

2. Create Custom PHP Configuration File:

   • Create a custom PHP configuration file (php.ini) and add the following line:

     extension=pdo_mysql.so

   • Place the file in the directory /usr/local/etc/php/conf.d/.

3. Build and Run Custom Image:

   • Build the custom Docker image using the custom Dockerfile.
   • Run the container using the built image.

Troubleshooting Tips:

• Ensure that the MySQL extension is installed and loaded correctly. Use php -i | grep PDO to check its status.
• Confirm that the custom PHP configuration file is loaded by checking the output of phpinfo(); die.
• Check for any errors in the Dockerfile or when building the image.

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