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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 |
|---|---|
| 857 | if ( 'edit' == $context ) { |
| 858 | $value = apply_filters("edit_term_$field", $value, $term_id, $taxonomy); |
| 859 | $value = apply_filters("edit_${taxonomy}_$field", $value, $term_id); |
| 860 | if ( 'description' == $field ) |
| 861 | $value = format_to_edit($value); |
| 862 | else |
| 863 | $value = attribute_escape($value); |
| 864 | } else if ( 'db' == $context ) { |
| 865 | $value = apply_filters("pre_term_$field", $value, $taxonomy); |
| 866 | $value = apply_filters("pre_${taxonomy}_$field", $value); |
| 867 | // Back compat filters |
| 868 | if ( 'slug' == $field ) |
| 869 | $value = apply_filters('pre_category_nicename', $value); |
| 870 | |
| 871 | } else if ( 'rss' == $context ) { |
| 872 | $value = apply_filters("term_${field}_rss", $value, $taxonomy); |
| 873 | $value = apply_filters("${taxonomy}_${field}_rss", $value); |
| 874 | } else { |
| 875 | // Use display filters by default. |