Programming PHP

Example 10-3. Changing the origin (continued)
Header("Content-Type:application/pdf");
Header("Content-Length:$len");
Header("Content-Disposition:inline; filename=coords.pdf");
echo $buf;
pdf_delete($pdf);
?>
The output of Example 10-3 is shown in Figure 10-3.
Figure 10-3. Changing the origin
The pdf_translate( ) function moves the origin to the top of the page, and pdf_
scale( ) inverts the Y-axis coordinates. To avoid producing text that can be read only
in a mirror, we set the horizscaling parameter.
Text Functions
PDF files have the concept of the current text position. It’s like a cursor—unless you
specify another location, when you insert text it appears at the current text location.
You set the text location with the pdf_set_textpos( ) function:
pdf_set_textpos(pdf, x, y);
Once you have positioned the cursor, use the pdf_show( ) function to draw text there:
pdf_show(pdf, text);
After you call pdf_show( ), the cursor moves to the end of the inserted text.
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