我正在尝试在服务器上动态创建PDF文档,并使用Zend_Pdf库将它们发送到客户端. PDF上的所有文本都需要与页面居中对齐,页面将是字母大小的横向.使用我在不同网站上多次发现的功能,我遇到了问题 – 中心理由是关闭的.所有文字都显得太偏左了.这是我的代码：
<?
require('Zend/Pdf.PHP');
$font = Zend_Pdf_Font::fontWithName(Zend_Pdf_Font::FONT_HELVETICA);
$pdf = new Zend_Pdf();
// Create a new page,add to page listing
$pdfPage = $pdf->newPage(Zend_Pdf_Page::SIZE_LETTER_LANDSCAPE);
$pdf->pages[] = $pdfPage;
// Add certify that
$pdfPage->setFont($font,15.75);
drawCenteredText($pdfPage,"THIS IS TO CERTIFY THAT",378);
// Add name
$pdfPage->setFont($font,39.75);
drawCenteredText($pdfPage,"Example Name",314.25);
// Headers
header("Content-type: application/pdf");
header("Content-Disposition: inline; filename=\"cert.pdf\"");
header('Content-Transfer-Encoding: binary');
header('Accept-Ranges: bytes');
// Output PDF
echo $pdf->render();
function drawCenteredText($page,$text,$bottom) {
$text_width = getTextWidth($text,$page->getFont(),$page->getFontSize());
$Box_width = $page->getWidth();
$left = ($Box_width - $text_width) / 2;
$page->drawText($text,$left,$bottom,'UTF-8');
}
function getTextWidth($text,$font,$font_size) {
$drawing_text = iconv('','UTF-8',$text);
$characters = array();
for ($i = 0; $i < strlen($drawing_text); $i++) {
$characters[] = (ord($drawing_text[$i++]) << 8) | ord ($drawing_text[$i]);
}
$glyphs = $font->glyphNumbersForCharacters($characters);
$widths = $font->widthsForGlyphs($glyphs);
$text_width = (array_sum($widths) / $font->getUnitsPerEm()) * $font_size;
return $text_width;
}
?>
……这就是结果.
如果其他人遇到类似的问题,问题在这里：
原文链接：https://www.f2er.com/php/133097.htmlfunction getTextWidth($text,$text);
$characters = array();
for ($i = 0; $i < strlen($drawing_text); $i++) {
$characters[] = (ord($drawing_text[$i++]) << 8) | ord ($drawing_text[$i]);
}
$glyphs = $font->glyphNumbersForCharacters($characters);
$widths = $font->widthsForGlyphs($glyphs);
$text_width = (array_sum($widths) / $font->getUnitsPerEm()) * $font_size;
return $text_width;
}
构建字符数组时,字符加载错误 – 8位,而不是16位.
$characters[] = ord ($drawing_text[$i]);
这解决了问题,并正确计算文本宽度.
