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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 |
|---|---|
| 1245 | |
| 1246 | /** |
| 1247 | * Filters the list of header image attributes. |
| 1248 | * |
| 1249 | * @since 5.9.0 |
| 1250 | * |
| 1251 | * @param array $attr Array of the attributes for the image tag. |
| 1252 | * @param object $header The custom header object returned by 'get_custom_header()'. |
| 1253 | */ |
| 1254 | $attr = apply_filters( 'get_header_image_tag_attributes', $attr, $header ); |
| 1255 | |
| 1256 | $attr = array_map( 'esc_attr', $attr ); |
| 1257 | $html = '<img'; |
| 1258 | |
| 1259 | foreach ( $attr as $name => $value ) { |
| 1260 | $html .= ' ' . $name . '="' . $value . '"'; |
| 1261 | } |
| 1262 | |
| 1263 | $html .= ' />'; |