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apply_filters( "default_option_{$option}", mixed $default, string $option, bool $passed_default )

Filters the default value for an option.

The dynamic portion of the hook name, $option, refers to the option name.

$default: (mixed) The default value to return if the option does not exist in the database.
$option: (string) Option name.
$passed_default: (bool) Was get_option() passed a default value?

Used By	Description
wp-includes/option.php: update_option()	Updates the value of an option that was already added.
wp-includes/option.php: add_option()	Adds a new option.
wp-includes/option.php: get_option()	Retrieves an option value based on an option name.

Version	Description
4.7.0	The `$passed_default` parameter was added to distinguish between a `false` value and the default parameter value.
4.4.0	The `$option` parameter was added.
3.4.0	Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/hooks/default_option_option