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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 |
|---|---|
| 942 | if ( 'description' == $field ) |
| 943 | $value = format_to_edit($value); |
| 944 | else |
| 945 | $value = attribute_escape($value); |
| 946 | } else if ( 'db' == $context ) { |
| 947 | $value = apply_filters("pre_term_$field", $value, $taxonomy); |
| 948 | $value = apply_filters("pre_${taxonomy}_$field", $value); |
| 949 | // Back compat filters |
| 950 | if ( 'slug' == $field ) |
| 951 | $value = apply_filters('pre_category_nicename', $value); |
| 952 | |
| 953 | } else if ( 'rss' == $context ) { |
| 954 | $value = apply_filters("term_${field}_rss", $value, $taxonomy); |
| 955 | $value = apply_filters("${taxonomy}_${field}_rss", $value); |
| 956 | } else { |
| 957 | // Use display filters by default. |
| 958 | $value = apply_filters("term_$field", $value, $term_id, $taxonomy, $context); |
| 959 | $value = apply_filters("${taxonomy}_$field", $value, $term_id, $context); |
| 960 | } |