PHP Extension Requires Chilkat v11.7.0+

Extract PDF Text to a StringBuilder and Save to a File

See more PDF Text Extraction Examples

Demonstrates ExtractTextSb, which writes the extracted text to a StringBuilder instead of returning it as a JSON string. Use it for large documents. The JSON output still receives the quality report. 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 PDF used in this example is available at long_report.pdf

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

print 'Number of pages: ' . $pdf->get_NumPages() . "\n";

//  ExtractTextSb takes the same operation and options as ExtractText, but the text
//  goes to a StringBuilder.  This avoids building a very large JSON string for
//  documents with many pages.
$json = new CkJsonObject();
$sbText = new CkStringBuilder();
$jsonOut = new CkJsonObject();

$success = $pdf->ExtractTextSb('text',$json,$sbText,$jsonOut);
if ($success == false) {
    print $pdf->lastErrorText() . "\n";
    exit;
}

print 'Extracted ' . $sbText->get_Length() . ' characters.' . "\n";

//  Save the text to a file.
$success = $sbText->WriteFile('qa_output/long_report.txt','utf-8',false);
if ($success == false) {
    print $sbText->lastErrorText() . "\n";
    exit;
}

//  The JSON output does not contain the text, but it still has the quality report.
print 'Quality: ' . $jsonOut->stringOf('quality.rating') . "\n";
print 'Pages with no text (need OCR): [' . $jsonOut->stringOf('quality.pagesNeedingOcr') . ']' . "\n";

//  Sample output:

//  Number of pages: 3
//  Extracted 4522 characters.
//  Quality: good
//  Pages with no text (need OCR): []

?>