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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 |
|---|---|
| 2197 | * the post field name. |
| 2198 | * |
| 2199 | * @since 2.3.0 |
| 2200 | * |
| 2201 | * @param mixed $value Value of the post field. |
| 2202 | * @param int $post_id Post ID. |
| 2203 | */ |
| 2204 | $value = apply_filters( "{$field_no_prefix}_edit_pre", $value, $post_id ); |
| 2205 | } else { |
| 2206 | $value = apply_filters( "edit_post_{$field}", $value, $post_id ); |
| 2207 | } |
| 2208 | |
| 2209 | if ( in_array($field, $format_to_edit) ) { |
| 2210 | if ( 'post_content' == $field ) |
| 2211 | $value = format_to_edit($value, user_can_richedit()); |
| 2212 | else |
| 2213 | $value = format_to_edit($value); |
| 2214 | } else { |
| 2215 | $value = esc_attr($value); |