我正在尝试在服务器上动态创建PDF文档,并使用Zend_Pdf库将其发送给客户端。 PDF上的所有文本都必须与页面居中对齐,页面大小应为字母大小,横向。使用在各种站点上多次发现的功能时,我遇到了一个问题-中心对齐不正确。所有文本都显示在左侧。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 $text_width;
}
?>
...这就是结果。
<< img src =“ https://image.soinside.com/eyJ1cmwiOiAiaHR0cHM6Ly9pLnN0YWNrLmltZ3VyLmNvbS83dU9YZC5wbmcifQ==” alt =“非居中的文字”>
如果其他任何人遇到类似的问题,问题在这里:
function getTextWidth($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;
}
[构建字符数组时,字符加载不正确-8位而不是16位。
$characters[] = ord ($drawing_text[$i]);
这解决了问题,并正确计算了文本宽度。
尝试使用此功能:
/**
* Return length of generated string in points
*
* @param string $text
* @param Zend_Pdf_Resource_Font|Zend_Pdf_Page $font
* @param int $fontSize
* @return double
*/
public static function getTextWidth($text, $resource, $fontSize = null/*, $encoding = null*/) {
//if( $encoding == null ) $encoding = 'UTF-8';
if( $resource instanceof Zend_Pdf_Page ){
$font = $resource->getFont();
$fontSize = $resource->getFontSize();
}elseif( $resource instanceof Zend_Pdf_Resource_Font ){
$font = $resource;
if( $fontSize === null ) throw new Exception('The fontsize is unknown');
}
if( !$font instanceof Zend_Pdf_Resource_Font ){
throw new Exception('Invalid resource passed');
}
$drawingText = $text;//iconv ( '', $encoding, $text );
$characters = array ();
for($i = 0; $i < strlen ( $drawingText ); $i ++) {
$characters [] = ord ( $drawingText [$i] );
}
$glyphs = $font->glyphNumbersForCharacters ( $characters );
$widths = $font->widthsForGlyphs ( $glyphs );
$textWidth = (array_sum ( $widths ) / $font->getUnitsPerEm ()) * $fontSize;
return $textWidth;
}
并在您的渲染函数上调用它,例如:
if ($this->getAlign() == self::TEXT_ALIGN_CENTER)
{
$x = ($currentPage->getWidth() - $this->getTextWidth($text, $currentPage)) / 2;
}
...
$currentPage->drawText($text, $x, $y, ...);
[如果有人在寻找解决诸如ó,á,é这样的拉丁美洲字符的方法对我有用
try {
$drawing_text = iconv('UTF-8', 'UTF-8', $text);
$characters = array();
for ($i = 0; $i < strlen($drawing_text); $i++) {
$characters[] = ord ($drawing_text[$i]);
}
$glyphs = $font->glyphNumbersForCharacters($characters);
$widths = $font->widthsForGlyphs($glyphs);
$text_width = (array_sum($widths) / $font->getUnitsPerEm()) * $font_size;
return $text_width;
} catch (\Exception $e) {
//echo "$e";
}