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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 |
|---|---|
| 118 | * |
| 119 | * The dynamic portion of the hook name, `$option`, refers to the option name. |
| 120 | * |
| 121 | * @since 1.5.0 As 'option_' . $setting |
| 122 | * @since 3.0.0 |
| 123 | * |
| 124 | * @param mixed $value Value of the option. If stored serialized, it will be |
| 125 | * unserialized prior to being returned. |
| 126 | */ |
| 127 | return apply_filters( 'option_' . $option, maybe_unserialize( $value ) ); |
| 128 | } |
| 129 | |
| 130 | /** |
| 131 | * Protect WordPress special option from being modified. |
| 132 | * |
| 133 | * Will die if $option is in protected list. Protected options are 'alloptions' |
| 134 | * and 'notoptions' options. |
| 135 | * |
| 136 | * @since 2.2.0 |