PDF_show_xy

(PHP 4, PECL pdflib >= 1.0.0)

PDF_show_xy — Output text at given position

说明

bool PDF_show_xy ( resource $p , string $text , float $x , float $y )

Prints text in the current font. 成功时返回 TRUE，或者在失败时返回 FALSE。

User Contributed Notes

Christopher Jastram <cej at intech dot com> 11-Dec-2005 09:52


Here's a little function that creates a pdf_show_xy_right() function with exactly the same parameters as pdf_show_xy(), except that the third parameter now specifies the right-aligned edge position.



function pdf_show_xy_right(&$pdf, $text, $right, $bottom) {

    $fontname = pdf_get_parameter($pdf, "fontname", 0);

    $font = pdf_findfont($pdf, $fontname, "host", 0);

    $size = pdf_get_value($pdf, "fontsize", 0);

    $width = pdf_stringwidth($pdf, $text, $font, $size);

    pdf_show_xy($pdf, $text, $right-$width, $bottom);

}



Set your font name and size separately, just as you would with pdf_show_xy(), and then call this function like so:



pdf_show_xy_right($pdf, "Hello World", 50, 200);



The third parameter is the right edge, fourth parameter is the baseline.  You do NOT have to pass in the font and size!

sigve at NwOoSlPfArMaidah dot no 01-Oct-2004 04:21


Want to do right-to-left text with pdflib? Just pick the right margin, and send it as $x to this function.



<?php

function pdf_show_xy_backwards ($pdf, $text, $font, $size, $x, $y) {

    $currx = $x;

    for ($i = strlen($text); $i > 0; $i--) {

        $char = substr((string)$text, $i-1, 1);

        $width = pdf_stringwidth($pdf, (string)$char, $font, $size);

        $currx = $currx - $width;

        pdf_show_xy($pdf, (string)$char, $currx, $y);

    }

}

?>

DrPsycho at easynet dot be 06-Dec-2002 06:41


No, that's just because in PDF the origin is at the lower left corner

nid at home dot se 02-Oct-2002 11:26


When using PDFLib version 4.0.3 under PHP 4.2.1 on Windows the Y-position is reversed, which means, the Y is the number of pixels that should be visible BELOW the texts baseline.