Add bookmark to current page

# ps_add_bookmark

(PECL ps >= 1.1.0)

ps_add_bookmark — Add bookmark to current page

### 说明

function ps_add_bookmark(
resource `$psdoc`,
string `$text`,
int `$parent` = 0,
int `$open` = 0
): int

Adds a bookmark for the current page. Bookmarks usually appear in PDF-Viewers left of the page in a hierarchical tree. Clicking on a bookmark will jump to the given page.

此说明在文档被打印或显示时不可见，只在文档用 Acrobat Distiller 或 Ghostview 转换成 PDF 时显示。

### 参数

`psdoc`

  Resource identifier of the postscript file as returned by ps_new().

`text`

  The text used for displaying the bookmark.

`parent`

  A bookmark previously created by this function which is used as the parent of the new bookmark.

`open`

  If `open` is unequal to zero the bookmark will be shown open by the pdf viewer.

### 返回值

The returned value is a reference for the bookmark. It is only used if the bookmark shall be used as a parent. The value is greater zero if the function succeeds. In case of an error zero will be returned.

### 参见

- ps_add_launchlink() - Adds link which launches file
- ps_add_pdflink() - Adds link to a page in a second pdf document
- ps_add_weblink() - Adds link to a web location

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