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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 |
|---|---|
| 1171 | /** |
| 1172 | * Holder for the 'format_to_post' filter. |
| 1173 | * |
| 1174 | * @since 0.71 |
| 1175 | * |
| 1176 | * @param string $content The text to pass through the filter. |
| 1177 | * @return string Text returned from the 'format_to_post' filter. |
| 1178 | */ |
| 1179 | function format_to_post($content) { |
| 1180 | $content = apply_filters('format_to_post', $content); |
| 1181 | return $content; |
| 1182 | } |
| 1183 | |
| 1184 | /** |
| 1185 | * Add leading zeros when necessary. |
| 1186 | * |
| 1187 | * If you set the threshold to '4' and the number is '10', then you will get |
| 1188 | * back '0010'. If you set the threshold to '4' and the number is '5000', then you |
| 1189 | * will get back '5000'. |