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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.
This hook occurs 3 times in this file.
| Line | Code |
|---|---|
| 202 | * Filters whether to disable captions. |
| 203 | * |
| 204 | * Prevents image captions from being appended to image HTML when inserted into the editor. |
| 205 | * |
| 206 | * @since 2.6.0 |
| 207 | * |
| 208 | * @param bool $bool Whether to disable appending captions. Returning true to the filter |
| 209 | * will disable captions. Default empty string. |
| 210 | */ |
| 211 | if ( empty( $caption ) || apply_filters( 'disable_captions', '' ) ) { |
| 212 | return $html; |
| 213 | } |
| 214 | |
| 215 | $id = ( 0 < (int) $id ) ? 'attachment_' . $id : ''; |
| 216 | |
| 217 | if ( ! preg_match( '/width=["\']([0-9]+)/', $html, $matches ) ) { |
| 218 | return $html; |
| 219 | } |
| 220 | |
| Line | Code |
| 2245 | |
| 2246 | if ( '' == f.src.value || '' == t.width ) |
| 2247 | return false; |
| 2248 | |
| 2249 | if ( f.alt.value ) |
| 2250 | alt = f.alt.value.replace(/'/g, ''').replace(/"/g, '"').replace(/</g, '<').replace(/>/g, '>'); |
| 2251 | |
| 2252 | <?php |
| 2253 | /** This filter is documented in wp-admin/includes/media.php */ |
| 2254 | if ( ! apply_filters( 'disable_captions', '' ) ) { |
| 2255 | ?> |
| 2256 | if ( f.caption.value ) { |
| 2257 | caption = f.caption.value.replace(/\r\n|\r/g, '\n'); |
| 2258 | caption = caption.replace(/<[a-zA-Z0-9]+( [^<>]+)?>/g, function(a){ |
| 2259 | return a.replace(/[\r\n\t]+/, ' '); |
| 2260 | }); |
| 2261 | |
| 2262 | caption = caption.replace(/\s*\n\s*/g, '<br />'); |
| 2263 | } |
| Line | Code |
| 2724 | * Creates the form for external url |
| 2725 | * |
| 2726 | * @since 2.7.0 |
| 2727 | * |
| 2728 | * @param string $default_view |
| 2729 | * @return string the form html |
| 2730 | */ |
| 2731 | function wp_media_insert_url_form( $default_view = 'image' ) { |
| 2732 | /** This filter is documented in wp-admin/includes/media.php */ |
| 2733 | if ( ! apply_filters( 'disable_captions', '' ) ) { |
| 2734 | $caption = ' |
| 2735 | <tr class="image-only"> |
| 2736 | <th scope="row" class="label"> |
| 2737 | <label for="caption"><span class="alignleft">' . __( 'Image Caption' ) . '</span></label> |
| 2738 | </th> |
| 2739 | <td class="field"><textarea id="caption" name="caption"></textarea></td> |
| 2740 | </tr> |
| 2741 | '; |
| 2742 | } else { |