CI 3.x - How to set database connection collation?

PHP Code:

// application/config/database.php
$db['default']['char_set'] = 'utf8mb4';
$db['default']['dbcollat'] = 'utf8mb4_unicode_ci'; 


Also make sure that you set it on the datbase also.

Code:

) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

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