PHP Extension Requires Chilkat v11.7.0+

PDF Footnotes in Markdown: Inline, at the End, or Dropped

See more PDF Text Extraction Examples

Demonstrates the "footnotes" option of the "markdown" operation. Small-print notes at the foot of a page are kept where they are ("inline", the default), gathered at the end of the document ("end"), or left out ("none"). PHP Extension

<?php

include("chilkat.php");

$success = false;

//  This example requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

//  The two-page PDF used in this example is available at footnotes.pdf

$pdf = new CkPdf();
$success = $pdf->LoadFile('qa_data/pdf/footnotes.pdf');
if ($success == false) {
    print $pdf->lastErrorText() . "\n";
    exit;
}

$json = new CkJsonObject();
$jsonOut = new CkJsonObject();

//  Page 1 has two superscript references in the text and the two notes in small print at its foot;
//  page 2 has a third.
$success = $pdf->ExtractText('markdown',$json,$jsonOut);
if ($success == false) {
    print $pdf->lastErrorText() . "\n";
    exit;
}

print '---- footnotes: inline (default) ----' . "\n";
print $jsonOut->stringOf('markdown') . "\n";

$json->UpdateString('footnotes','end');
$success = $pdf->ExtractText('markdown',$json,$jsonOut);
if ($success == false) {
    print $pdf->lastErrorText() . "\n";
    exit;
}

print '---- footnotes: end ----' . "\n";
print $jsonOut->stringOf('markdown') . "\n";

$json->UpdateString('footnotes','none');
$success = $pdf->ExtractText('markdown',$json,$jsonOut);
if ($success == false) {
    print $pdf->lastErrorText() . "\n";
    exit;
}

print '---- footnotes: none ----' . "\n";
print $jsonOut->stringOf('markdown') . "\n";

//  Sample output:

//  ---- footnotes: inline (default) ----
//  <!-- page 1 -->
//  
//  # The Lens on Loan
//  
//  The society located a fourth-order lens of the correct period at a museum1 in the next county, and an agreement to loan it for ten years was signed in November.2 The lens will be lit with a low-wattage electric lamp rather than oil, and it will be displayed as a historic light rather than registered as an aid to navigation.
//  
//  1 The county maritime museum, which holds three lenses from decommissioned lights. 2 The loan is renewable and carries no fee; the society insures the lens.
//  
//  <!-- page 2 -->
//  
//  # Public Access
//  
//  The grounds opened to visitors on weekends from July. Nearly three thousand people climbed the tower over the summer,3 with no incidents.
//  
//  3 Counted at the entrance by the volunteers on duty.
//  
//  ---- footnotes: end ----
//  <!-- page 1 -->
//  
//  # The Lens on Loan
//  
//  The society located a fourth-order lens of the correct period at a museum1 in the next county, and an agreement to loan it for ten years was signed in November.2 The lens will be lit with a low-wattage electric lamp rather than oil, and it will be displayed as a historic light rather than registered as an aid to navigation.
//  
//  <!-- page 2 -->
//  
//  # Public Access
//  
//  The grounds opened to visitors on weekends from July. Nearly three thousand people climbed the tower over the summer,3 with no incidents.
//  
//  1 The county maritime museum, which holds three lenses from decommissioned lights. 2 The loan is renewable and carries no fee; the society insures the lens.
//  
//  3 Counted at the entrance by the volunteers on duty.
//  
//  ---- footnotes: none ----
//  <!-- page 1 -->
//  
//  # The Lens on Loan
//  
//  The society located a fourth-order lens of the correct period at a museum1 in the next county, and an agreement to loan it for ten years was signed in November.2 The lens will be lit with a low-wattage electric lamp rather than oil, and it will be displayed as a historic light rather than registered as an aid to navigation.
//  
//  <!-- page 2 -->
//  
//  # Public Access
//  
//  The grounds opened to visitors on weekends from July. Nearly three thousand people climbed the tower over the summer,3 with no incidents.

?>