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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 |
|---|---|
| 2171 | * the post field name. |
| 2172 | * |
| 2173 | * @since 2.3.0 |
| 2174 | * |
| 2175 | * @param mixed $value Value of the post field. |
| 2176 | * @param int $post_id Post ID. |
| 2177 | */ |
| 2178 | $value = apply_filters( "{$field_no_prefix}_edit_pre", $value, $post_id ); |
| 2179 | } else { |
| 2180 | $value = apply_filters( "edit_post_{$field}", $value, $post_id ); |
| 2181 | } |
| 2182 | |
| 2183 | if ( in_array($field, $format_to_edit) ) { |
| 2184 | if ( 'post_content' == $field ) |
| 2185 | $value = format_to_edit($value, user_can_richedit()); |
| 2186 | else |
| 2187 | $value = format_to_edit($value); |
| 2188 | } else { |
| 2189 | $value = esc_attr($value); |