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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 |
|---|---|
| 419 | */ |
| 420 | function atom_enclosure() { |
| 421 | if ( post_password_required() ) |
| 422 | return; |
| 423 | |
| 424 | foreach ( (array) get_post_custom() as $key => $val ) { |
| 425 | if ($key == 'enclosure') { |
| 426 | foreach ( (array) $val as $enc ) { |
| 427 | $enclosure = split("\n", $enc); |
| 428 | echo apply_filters('atom_enclosure', '<link href="' . trim(htmlspecialchars($enclosure[0])) . '" rel="enclosure" length="' . trim($enclosure[1]) . '" type="' . trim($enclosure[2]) . '" />' . "\n"); |
| 429 | } |
| 430 | } |
| 431 | } |
| 432 | } |
| 433 | |
| 434 | /** |
| 435 | * Determine the type of a string of data with the data formatted. |
| 436 | * |
| 437 | * Tell whether the type is text, html, or xhtml, per RFC 4287 section 3.1. |