PDF_setgray
(PHP 4, PECL pdflib >= 1.0.0)
PDF_setgray — Set color to gray [deprecated]
说明
PDF_setgray ( resource$p
, float $g
) : bool
Sets the current fill and stroke color to a gray value between 0 and 1 inclusive. 成功时返回 TRUE， 或者在失败时返回 FALSE。
This function is deprecated since PDFlib version 4, use PDF_setcolor() instead.
User Contributed Notes 1 note
up down 0 leea at digitus dot com dot au ¶18 years ago
pdf_setgray double values start at 0 for black and end at 1 for white so for any shade of gray simply pick a value inbetween these 2 numbers
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官方地址：https://www.php.net/manual/en/function.pdf-setgray.php