Filters the value of all existing options before it is retrieved.

Description

Returning a truthy value from the filter will effectively short-circuit retrieval and return the passed value instead.

Parameters

$pre_optionmixed

The value to return instead of the option value. This differs from $default_value, which is used as the fallback value in the event the option doesn’t exist elsewhere in get_option() .
Default false (to skip past the short-circuit).

$optionstring

Name of the option.

$default_valuemixed

The fallback value to return if the option does not exist.
Default false.

Source

$pre = apply_filters( 'pre_option', $pre, $option, $default_value );

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