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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 |
|---|---|
| 73 | * |
| 74 | * @param mixed $pre_option The value to return instead of the option value. This differs |
| 75 | * from `$default`, which is used as the fallback value in the event |
| 76 | * the option doesn't exist elsewhere in get_option(). |
| 77 | * Default false (to skip past the short-circuit). |
| 78 | * @param string $option Option name. |
| 79 | * @param mixed $default The fallback value to return if the option does not exist. |
| 80 | * Default false. |
| 81 | */ |
| 82 | $pre = apply_filters( "pre_option_{$option}", false, $option, $default ); |
| 83 | |
| 84 | if ( false !== $pre ) { |
| 85 | return $pre; |
| 86 | } |
| 87 | |
| 88 | if ( defined( 'WP_SETUP_CONFIG' ) ) { |
| 89 | return false; |
| 90 | } |
| 91 | |