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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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123 | * |
124 | * @param mixed $pre_option The value to return instead of the option value. This differs from |
125 | * `$default_value`, which is used as the fallback value in the event |
126 | * the option doesn't exist elsewhere in get_option(). |
127 | * Default false (to skip past the short-circuit). |
128 | * @param string $option Option name. |
129 | * @param mixed $default_value The fallback value to return if the option does not exist. |
130 | * Default false. |
131 | */ |
132 | $pre = apply_filters( "pre_option_{$option}", false, $option, $default_value ); |
133 |
|
134 | /** |
135 | * Filters the value of all existing options before it is retrieved. |
136 | * |
137 | * Returning a truthy value from the filter will effectively short-circuit retrieval |
138 | * and return the passed value instead. |
139 | * |
140 | * @since 6.1.0 |
141 | * |