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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 |
---|---|
703 | if ( 'description' == $field ) |
704 | $value = format_to_edit($value); |
705 | else |
706 | $value = attribute_escape($value); |
707 | } else if ( 'db' == $context ) { |
708 | $value = apply_filters("pre_term_$field", $value, $taxonomy); |
709 | $value = apply_filters("pre_${taxonomy}_$field", $value); |
710 | // Back compat filters |
711 | if ( 'slug' == $field ) |
712 | $value = apply_filters('pre_category_nicename', $value); |
713 | |
714 | } else if ( 'rss' == $context ) { |
715 | $value = apply_filters("term_${field}_rss", $value, $taxonomy); |
716 | $value = apply_filters("${taxonomy}_$field_rss", $value); |
717 | } else { |
718 | // Use display filters by default. |
719 | $value = apply_filters("term_$field", $value, $term_id, $taxonomy, $context); |
720 | $value = apply_filters("${taxonomy}_$field", $value, $term_id, $context); |
721 | } |