PDF_begin_itemPDF_begin_layer
(PECL pdflib >= 2.0.0)
PDF_begin_layer — Start layer
说明
bool PDF_begin_layer
( resource
$pdfdoc
, int $layer
)
Starts a layer for subsequent output on the page. 成功时返回 TRUE， 或者在失败时返回 FALSE.
This function requires PDF 1.5.
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