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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 |
|---|---|
| 1276 | /** |
| 1277 | * Holder for the 'format_to_post' filter. |
| 1278 | * |
| 1279 | * @since 0.71 |
| 1280 | * |
| 1281 | * @param string $content The text to pass through the filter. |
| 1282 | * @return string Text returned from the 'format_to_post' filter. |
| 1283 | */ |
| 1284 | function format_to_post($content) { |
| 1285 | $content = apply_filters('format_to_post', $content); |
| 1286 | return $content; |
| 1287 | } |
| 1288 | |
| 1289 | /** |
| 1290 | * Add leading zeros when necessary. |
| 1291 | * |
| 1292 | * If you set the threshold to '4' and the number is '10', then you will get |
| 1293 | * back '0010'. If you set the threshold to '4' and the number is '5000', then you |
| 1294 | * will get back '5000'. |