php - Tool for exporting html as pdf

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php - Tool for exporting html as pdf

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

I have a html document which marks up a report. I have a button on this page "Export as pdf". However I am not sure how to export html into a pdf..Are there any tools out there that anyone recommends for such a task..

EDIT: In more detail:

I have the following php:

<?php

function connect() {
  $dbh = mysql_connect ("localhost", "user", "password") or die ('I cannot connect to the database because: ' . mysql_error());
  mysql_select_db("PDS", $dbh); 
  return $dbh;
}

session_start();

if(isset($_SESSION['username'])){
  if(isset($_POST['entryId'])){
    //do something
    $dbh = connect();
    $ide = $_POST['entryId'];
    $usertab = $_POST['usertable'];
    $answertable = $usertab . "Answers";
    $entrytable = $usertab . "Entries";
    $query = mysql_query("SELECT e.date, q.questionNumber, q.question, q.sectionId, a.answer FROM $answertable a, Questions q, $entrytable e WHERE a.entryId = '$ide' AND a.questionId = q.questionId AND e.entryId = '$ide' ORDER BY q.questionNumber ASC;") or die("Error: " . mysql_error());

    if($query){
      //set variables

      $sectionOne = array();
      $sectionTwo = array();
      $sectionThree = array();
      $sectionFour = array();
      $sectionFive = array();
      while($row=mysql_fetch_assoc($query)){
    $date = $row['date'];
    $section = $row['sectionId'];
    switch($section){
    case '1':
      $sectionOne[] = $row;
      break;
    case '2':
      $sectionTwo[] = $row;
      break;
    case '3':
      $sectionThree[] = $row;
      break;
        case '4':
      $sectionFour[] = $row;
      break;
        case '5':
      $sectionFive[] = $row;
      break;
        default:    
      break;      
    }
      }
    }else{
      //error - sql failed
    }
  }

?>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
   <head>
   <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
   <script src = "jQuery.js"></script>
   <script>
   $(document).ready(function(){

   });
  </script>
  <title>Personal Diary System - Entry Report - <?php echo($date); ?></title>
  </head>
  <body>
  <h1>Entry Report - <?php echo($date); ?></h1>    
  <div id = "buttons">
  <a href = "http://dev.speechlink.co.uk">Export as PDF</a>                       
  </div>                         
  <h3>Biological Information</h3>
  <?php
      $i = 0;                         
      foreach($sectionOne as &$value){
    if($i == 1 || $i == 3){
      $image = "assets/urine".$i.".png";
      echo("<br/>");
      echo($value['question']." <br/> "."<img src = "$image"/>");
      echo("<br/>");
    }else{
      echo($value['question'].' : '.$value['answer']);
    }
    echo("<br/>");
    $i++;
      }
  ?>
  <h3>Fatigue and Recovery</h3>
  <?php
      foreach($sectionTwo as &$value){
    echo($value['question'].' : '.$value['answer']);
    echo("<br/>");
      }
  ?>
  <h3>Illness and Injury</h3>
  <?php
      foreach($sectionThree as &$value){
    echo($value['question'].' : '.$value['answer']);
    echo("<br/>");
      }
  ?>
  <h3>Training Sessions</h3>
  <?php
      foreach($sectionFour as &$value){
    echo($value['question'].' : '.$value['answer']);
    echo("<br/>");
      }
  ?>
  <h3>General Feedback</h3>
  <?php 
     if(count($sectionFive)>0){
      foreach($sectionFive as &$value){
    echo($value['question'].' : '.$value['answer']);    
      }
     }else{
       echo("User didn't leave any feedback");
     }
     echo("<br/>");
  ?>
  </body>
</html>
<?php
}
?>

This displays the following:

enter image description here

So if I'm using fpdf, what is the best way to export the following as a pdf? Should I write a fpdf function in the same php file or is it best to write a separate php file which creates and displays the pdf (which means I would have to post all relevant data to this file)...

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1 Answer

深蓝 · Answer 1 · 2021-10-23T21:17:13+0000

Use FPDF library for php check here

The first and the main base for this file conversion is FPDF library. FPDF is a pure PHP class to generate PDF files on the fly. Let us start the PDF generation with a simple Hello world display.

<?php
require('fpdf.php');

$pdf=new FPDF();
$pdf->AddPage();
$pdf->SetFont('Arial','B',16);
$pdf->Cell(40,10,'Hello World!');
$pdf->Output();
?>

To generate a pdf file, first we need to include library file fpdf.php. Then we need to create an FPDF object using the default constructor FPDF(). This constructor can be passed three values namely page orientation (portrait or landscape), measure unit, and page size (A4, A5, etc.,). By default pages are in A4 portrait and the measure unit is millimeter. It could have been specified explicitly with:

$pdf=new FPDF('P','mm','A4');

It is possible to use landscape (L), other page formats (such as Letter and Legal) and measure units (pt, cm, in).

Then we have added a page to our pdf document with AddPage(). The origin is at the upper-left corner and the current position is by default placed at 1 cm from the borders; the margins can be changed with the function SetMargins().

To print a text, we need to first select a font with SetFont(). Let us select Arial bold 16:

$pdf->SetFont('Arial','B',16);

We use Cell() function to output a text. A cell is a rectangular area, possibly framed, which contains some text. It is output at the current position. We specify its dimensions, its text (centered or aligned), if borders should be drawn, and where the current position moves after it (to the right, below or to the beginning of the next line). To add a frame, we would do this:

$pdf->Cell(40,10,'Hello World !',1);

Finally, the document is closed and sent to the browser with Output(). We could have saved it in a file by passing the desired file name.

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