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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 |
|---|---|
| 839 | if ( false !== strpos($field, 'user_') ) { |
| 840 | $prefixed = true; |
| 841 | $field_no_prefix = str_replace('user_', '', $field); |
| 842 | } |
| 843 | |
| 844 | if ( 'edit' == $context ) { |
| 845 | if ( $prefixed ) { |
| 846 | $value = apply_filters("edit_$field", $value, $user_id); |
| 847 | } else { |
| 848 | $value = apply_filters("edit_user_$field", $value, $user_id); |
| 849 | } |
| 850 | |
| 851 | if ( 'description' == $field ) |
| 852 | $value = esc_html($value); |
| 853 | else |
| 854 | $value = esc_attr($value); |
| 855 | } else if ( 'db' == $context ) { |
| 856 | if ( $prefixed ) { |
| 857 | $value = apply_filters("pre_$field", $value); |