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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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226 | $map = apply_filters( 'twenty_twenty_one_social_icons_map', self::$social_icons_map ); |
227 |
|
228 | /** |
229 | * Filters Twenty Twenty-One's array of social icons. |
230 | * |
231 | * @since Twenty Twenty-One 1.0 |
232 | * |
233 | * @param array $social_icons Array of default social icons. |
234 | */ |
235 | $social_icons = apply_filters( 'twenty_twenty_one_svg_icons_social', self::$social_icons ); |
236 |
|
237 | foreach ( array_keys( $social_icons ) as $icon ) { |
238 | $domains = array_key_exists( $icon, $map ) ? $map[ $icon ] : array( sprintf( '%s.com', $icon ) ); |
239 | $domains = array_map( 'trim', $domains ); // Remove leading/trailing spaces, to prevent regex from failing to match. |
240 | $domains = array_map( 'preg_quote', $domains ); |
241 | $regex_map[ $icon ] = sprintf( '/(%s)/i', implode( '|', $domains ) ); |
242 | } |
243 | } |
244 | foreach ( $regex_map as $icon => $regex ) { |