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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 |
|---|---|
| 191 | * Filters whether to disable captions. |
| 192 | * |
| 193 | * Prevents image captions from being appended to image HTML when inserted into the editor. |
| 194 | * |
| 195 | * @since 2.6.0 |
| 196 | * |
| 197 | * @param bool $bool Whether to disable appending captions. Returning true to the filter |
| 198 | * will disable captions. Default empty string. |
| 199 | */ |
| 200 | if ( empty($caption) || apply_filters( 'disable_captions', '' ) ) |
| 201 | return $html; |
| 202 | |
| 203 | $id = ( 0 < (int) $id ) ? 'attachment_' . $id : ''; |
| 204 | |
| 205 | if ( ! preg_match( '/width=["\']([0-9]+)/', $html, $matches ) ) |
| 206 | return $html; |
| 207 | |
| 208 | $width = $matches[1]; |
| 209 | |
| Line | Code |
| 2097 | |
| 2098 | if ( '' == f.src.value || '' == t.width ) |
| 2099 | return false; |
| 2100 | |
| 2101 | if ( f.alt.value ) |
| 2102 | alt = f.alt.value.replace(/'/g, ''').replace(/"/g, '"').replace(/</g, '<').replace(/>/g, '>'); |
| 2103 | |
| 2104 | <?php |
| 2105 | /** This filter is documented in wp-admin/includes/media.php */ |
| 2106 | if ( ! apply_filters( 'disable_captions', '' ) ) { |
| 2107 | ?> |
| 2108 | if ( f.caption.value ) { |
| 2109 | caption = f.caption.value.replace(/\r\n|\r/g, '\n'); |
| 2110 | caption = caption.replace(/<[a-zA-Z0-9]+( [^<>]+)?>/g, function(a){ |
| 2111 | return a.replace(/[\r\n\t]+/, ' '); |
| 2112 | }); |
| 2113 | |
| 2114 | caption = caption.replace(/\s*\n\s*/g, '<br />'); |
| 2115 | } |
| Line | Code |
| 2536 | * Creates the form for external url |
| 2537 | * |
| 2538 | * @since 2.7.0 |
| 2539 | * |
| 2540 | * @param string $default_view |
| 2541 | * @return string the form html |
| 2542 | */ |
| 2543 | function wp_media_insert_url_form( $default_view = 'image' ) { |
| 2544 | /** This filter is documented in wp-admin/includes/media.php */ |
| 2545 | if ( ! apply_filters( 'disable_captions', '' ) ) { |
| 2546 | $caption = ' |
| 2547 | <tr class="image-only"> |
| 2548 | <th scope="row" class="label"> |
| 2549 | <label for="caption"><span class="alignleft">' . __('Image Caption') . '</span></label> |
| 2550 | </th> |
| 2551 | <td class="field"><textarea id="caption" name="caption"></textarea></td> |
| 2552 | </tr> |
| 2553 | '; |
| 2554 | } else { |