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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 Functions
PHP Manual