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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 |
|---|---|
| 1515 | /** |
| 1516 | * Filters the attachment markup to be prepended to the post content. |
| 1517 | * |
| 1518 | * @since 2.0.0 |
| 1519 | * |
| 1520 | * @see prepend_attachment() |
| 1521 | * |
| 1522 | * @param string $p The attachment HTML output. |
| 1523 | */ |
| 1524 | $p = apply_filters( 'prepend_attachment', $p ); |
| 1525 | |
| 1526 | return "$p\n$content"; |
| 1527 | } |
| 1528 | |
| 1529 | // |
| 1530 | // Misc |
| 1531 | // |
| 1532 | |
| 1533 | /** |