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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 |
|---|---|
| 507 | do_action('import_post_added', $post_id); |
| 508 | print "</li>\n"; |
| 509 | } |
| 510 | |
| 511 | function process_post_meta($post_id, $key, $value) { |
| 512 | // the filter can return false to skip a particular metadata key |
| 513 | $_key = apply_filters('import_post_meta_key', $key); |
| 514 | if ( $_key ) { |
| 515 | add_post_meta( $post_id, $_key, $value ); |
| 516 | do_action('import_post_meta', $post_id, $_key, $value); |
| 517 | } |
| 518 | } |
| 519 | |
| 520 | function process_attachment($postdata, $remote_url) { |
| 521 | if ($this->fetch_attachments and $remote_url) { |
| 522 | printf( __('Importing attachment <em>%s</em>... '), htmlspecialchars($remote_url) ); |
| 523 | $upload = $this->fetch_remote_file($postdata, $remote_url); |
| 524 | if ( is_wp_error($upload) ) { |
| 525 | printf( __('Remote file error: %s'), htmlspecialchars($upload->get_error_message()) ); |