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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 |
|---|---|
| 766 | |
| 767 | if ( 'edit' == $context ) { |
| 768 | $format_to_edit = array('post_content', 'post_excerpt', 'post_title', 'post_password'); |
| 769 | |
| 770 | if ( $prefixed ) { |
| 771 | $value = apply_filters("edit_$field", $value, $post_id); |
| 772 | // Old school |
| 773 | $value = apply_filters("${field_no_prefix}_edit_pre", $value, $post_id); |
| 774 | } else { |
| 775 | $value = apply_filters("edit_post_$field", $value, $post_id); |
| 776 | } |
| 777 | |
| 778 | if ( in_array($field, $format_to_edit) ) { |
| 779 | if ( 'post_content' == $field ) |
| 780 | $value = format_to_edit($value, user_can_richedit()); |
| 781 | else |
| 782 | $value = format_to_edit($value); |
| 783 | } else { |
| 784 | $value = attribute_escape($value); |