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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 |
|---|---|
| 1418 | */ |
| 1419 | function format_to_post($content) { |
| 1420 | /** |
| 1421 | * Filter the string returned by format_to_post(). |
| 1422 | * |
| 1423 | * @since 1.2.0 |
| 1424 | * |
| 1425 | * @param string $content The string to format. |
| 1426 | */ |
| 1427 | $content = apply_filters( 'format_to_post', $content ); |
| 1428 | return $content; |
| 1429 | } |
| 1430 | |
| 1431 | /** |
| 1432 | * Add leading zeros when necessary. |
| 1433 | * |
| 1434 | * If you set the threshold to '4' and the number is '10', then you will get |
| 1435 | * back '0010'. If you set the threshold to '4' and the number is '5000', then you |
| 1436 | * will get back '5000'. |