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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.
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215 | * Filters Twenty Twenty-Ones's array of domain mappings for social icons. |
216 | * |
217 | * By default, each Icon ID is matched against a .com TLD. To override this behavior, |
218 | * specify all the domains it covers (including the .com TLD too, if applicable). |
219 | * |
220 | * @since Twenty Twenty-One 1.0 |
221 | * |
222 | * @param array $social_icons_map Array of default social icons. |
223 | */ |
224 | $map = apply_filters( 'twenty_twenty_one_social_icons_map', self::$social_icons_map ); |
225 |
|
226 | /** |
227 | * Filters Twenty Twenty-One's array of social icons. |
228 | * |
229 | * @since Twenty Twenty-One 1.0 |
230 | * |
231 | * @param array $social_icons Array of default social icons. |
232 | */ |
233 | $social_icons = apply_filters( 'twenty_twenty_one_svg_icons_social', self::$social_icons ); |