How to Check if PDO is Properly Configured and Functional for MySQL in PHP?

Verifying PDO Availability in PHP

Question:

How can I determine if PHP Data Objects (PDO) is properly configured and functional for use with MySQL on my hosting platform?

Answer:

Method 1: Using phpinfo()

PDO is an integral part of PHP 5.1 and later versions. To verify its presence, you can use the following command:

<code class="php">phpinfo();</code>

This will display a list of all loaded PHP extensions, including PDO.

Method 2: Checking Specific PDO Drivers

Certain PHP extensions are required for specific database drivers. You can check for the presence of the MySQL PDO driver using the following constant:

<code class="php">var_dump(defined(PDO::MYSQL_ATTR_LOCAL_INFILE));</code>

Method 3: Using the Command Line

You can check for the availability of PDO from the command line using the following command:

$ php -m

This will display a list of all loaded PHP modules, including PDO.

Method 4: Using PHP Extension Functions

Alternatively, you can use the following functions:

<code class="php">extension_loaded('PDO'); // Returns boolean
extension_loaded('pdo_mysql'); // Returns boolean</code>

You can also get a list of all loaded PHP extensions and search for 'PDO' or 'pdo_mysql'.

Note: Not all PDO drivers have specific constants defined, making phpinfo() the most reliable option.

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