FPDF字母间距 [英] FPDF Letter Spacing

问题描述

我正在尝试为fpdf中的特定文本块"设置字母间距.我进行了搜索，但只找到了一种为整个文档设置字母间距的方法，即使那样也没有用.文本已发布到php fpdf生成器.

I am trying to set the letterspacing for a specific 'block' of text in fpdf. I have searched and have only found one way to set the letterspacing for the whole doc, and even that didn't work. The text is posted to the php fpdf generator.

$pdf->SetFont('Arial','b',85, LetterSpacing Here?);

有帮助吗?

推荐答案

基于其他提供的答案，我扩展了我们使用的FPDF类，以便在下划线时考虑用户定义的字母间距.

Based on other provided answers, I extended the FPDF class that we use so that underlining takes into account user-defined letter spacing.

<?php
class Custom_FPDF extends FPDF
{
protected $FontSpacingPt;      // current font spacing in points
protected $FontSpacing;        // current font spacing in user units

function SetFontSpacing($size)
{
    if($this->FontSpacingPt==$size)
        return;
    $this->FontSpacingPt = $size;
    $this->FontSpacing = $size/$this->k;
    if ($this->page>0)
        $this->_out(sprintf('BT %.3f Tc ET', $size));
}

protected function _dounderline($x, $y, $txt)
{
    // Underline text
    $up = $this->CurrentFont['up'];
    $ut = $this->CurrentFont['ut'];
    $w = $this->GetStringWidth($txt)+$this->ws*substr_count($txt,' ')+(strlen($txt)-1)*$this->FontSpacing;
    return sprintf('%.2F %.2F %.2F %.2F re f',$x*$this->k,($this->h-($y-$up/1000*$this->FontSize))*$this->k,$w*$this->k,-$ut/1000*$this->FontSizePt);
}
}

样品使用测试:

$pdf = new Custom_FPDF();
$pdf->AddPage();
$pdf->SetFont('Arial', 'BU', 11);
$pdf->SetFontSpacing(3);
$pdf->Cell(0, 10, 'Test of letter spacing with underline', 0, 1);
$pdf->SetFontSpacing(0);
$pdf->Cell(0, 10, 'Test of letter spacing with underline');
$pdf->Output();

已测试扩展的FPDF版本1.81

Tested extending FPDF version 1.81

这篇关于FPDF字母间距的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！