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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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1180 | } |
1181 |
|
1182 | /** |
1183 | * Filters the header image URL. |
1184 | * |
1185 | * @since 6.1.0 |
1186 | * |
1187 | * @param string $url Header image URL. |
1188 | */ |
1189 | $url = apply_filters( 'get_header_image', $url ); |
1190 |
|
1191 | if ( ! is_string( $url ) ) { |
1192 | return false; |
1193 | } |
1194 |
|
1195 | $url = trim( $url ); |
1196 | return sanitize_url( set_url_scheme( $url ) ); |
1197 | } |
1198 |
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