PDF_set_info
PDF_set_leading
PDF Functions
PHP Manual

# PDF_set_layer_dependency

(PECL pdflib >= 2.0.0)

PDF_set_layer_dependency — Define relationships among layers

### Description

bool PDF_set_layer_dependency ( resource `$pdfdoc` , string `$type` , string `$optlist` )

Defines hierarchical and group relationships among layers. Returns `TRUE` on success or `FALSE` on failure.

This function requires PDF 1.5.

PDF_set_info
PDF_set_leading
PDF Functions
PHP Manual