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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 |
|---|---|
| 162 | * Filter whether to disable captions. |
| 163 | * |
| 164 | * Prevents image captions from being appended to image HTML when inserted into the editor. |
| 165 | * |
| 166 | * @since 2.6.0 |
| 167 | * |
| 168 | * @param bool $bool Whether to disable appending captions. Returning true to the filter |
| 169 | * will disable captions. Default empty string. |
| 170 | */ |
| 171 | if ( empty($caption) || apply_filters( 'disable_captions', '' ) ) |
| 172 | return $html; |
| 173 | |
| 174 | $id = ( 0 < (int) $id ) ? 'attachment_' . $id : ''; |
| 175 | |
| 176 | if ( ! preg_match( '/width=["\']([0-9]+)/', $html, $matches ) ) |
| 177 | return $html; |
| 178 | |
| 179 | $width = $matches[1]; |
| 180 | |
| Line | Code |
| 1986 | |
| 1987 | if ( '' == f.src.value || '' == t.width ) |
| 1988 | return false; |
| 1989 | |
| 1990 | if ( f.alt.value ) |
| 1991 | alt = f.alt.value.replace(/'/g, ''').replace(/"/g, '"').replace(/</g, '<').replace(/>/g, '>'); |
| 1992 | |
| 1993 | <?php |
| 1994 | /** This filter is documented in wp-admin/includes/media.php */ |
| 1995 | if ( ! apply_filters( 'disable_captions', '' ) ) { |
| 1996 | ?> |
| 1997 | if ( f.caption.value ) { |
| 1998 | caption = f.caption.value.replace(/\r\n|\r/g, '\n'); |
| 1999 | caption = caption.replace(/<[a-zA-Z0-9]+( [^<>]+)?>/g, function(a){ |
| 2000 | return a.replace(/[\r\n\t]+/, ' '); |
| 2001 | }); |
| 2002 | |
| 2003 | caption = caption.replace(/\s*\n\s*/g, '<br />'); |
| 2004 | } |
| Line | Code |
| 2418 | * Creates the form for external url |
| 2419 | * |
| 2420 | * @since 2.7.0 |
| 2421 | * |
| 2422 | * @param string $default_view |
| 2423 | * @return string the form html |
| 2424 | */ |
| 2425 | function wp_media_insert_url_form( $default_view = 'image' ) { |
| 2426 | /** This filter is documented in wp-admin/includes/media.php */ |
| 2427 | if ( ! apply_filters( 'disable_captions', '' ) ) { |
| 2428 | $caption = ' |
| 2429 | <tr class="image-only"> |
| 2430 | <th scope="row" class="label"> |
| 2431 | <label for="caption"><span class="alignleft">' . __('Image Caption') . '</span></label> |
| 2432 | </th> |
| 2433 | <td class="field"><textarea id="caption" name="caption"></textarea></td> |
| 2434 | </tr> |
| 2435 | '; |
| 2436 | } else { |