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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
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517 | /** |
518 | * Fires immediately before an option value is updated. |
519 | * |
520 | * @since 2.9.0 |
521 | * |
522 | * @param string $option Name of the option to update. |
523 | * @param mixed $old_value The old option value. |
524 | * @param mixed $value The new option value. |
525 | */ |
526 | do_action( 'update_option', $option, $old_value, $value ); |
527 |
|
528 | $update_args = array( |
529 | 'option_value' => $serialized_value, |
530 | ); |
531 |
|
532 | if ( null !== $autoload ) { |
533 | $update_args['autoload'] = ( 'no' === $autoload || false === $autoload ) ? 'no' : 'yes'; |
534 | } |
535 |
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