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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 |
|---|---|
| 926 | } else { |
| 927 | $value = apply_filters("pre_post_$field", $value); |
| 928 | $value = apply_filters("${field}_pre", $value); |
| 929 | } |
| 930 | } else { |
| 931 | // Use display filters by default. |
| 932 | if ( $prefixed ) |
| 933 | $value = apply_filters($field, $value, $post_id, $context); |
| 934 | else |
| 935 | $value = apply_filters("post_$field", $value, $post_id, $context); |
| 936 | } |
| 937 | |
| 938 | if ( 'attribute' == $context ) |
| 939 | $value = esc_attr($value); |
| 940 | else if ( 'js' == $context ) |
| 941 | $value = esc_js($value); |
| 942 | |
| 943 | return $value; |
| 944 | } |