PHP ActiveX Requires Chilkat v11.7.0+

Replace the Value After a Label in a PDF (Re-issue an Invoice)

See more PDF Text Replacement Examples

Demonstrates replacing the values that follow labels such as "Invoice Number:" on a PDF that has no placeholders -- an ordinary invoice. Each entry of the "labels" array names a label as it appears on the page and the new value; the value replaces the rest of the label's line. Label matching ignores case, extra spaces and a trailing colon. The replaced text is read back with ExtractText to confirm it. PHP ActiveX

<?php

$success = 0;

//  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 invoice_labels.pdf

$pdf = new COM("Chilkat.Pdf");
$success = $pdf->LoadFile('qa_data/pdf/invoice_labels.pdf');
if ($success == 0) {
    print $pdf->LastErrorText . "\n";
    exit;
}

//  The invoice has lines such as "Invoice Number:   INV-2026-0412" and "Total Due:  $1,234.53".
//  Each label's new value replaces whatever follows the label on its line.
$json = new COM("Chilkat.JsonObject");
$json->UpdateString('labels[0].label','Invoice Number:');
$json->UpdateString('labels[0].value','INV-2026-0500');
$json->UpdateString('labels[1].label','Invoice Date:');
$json->UpdateString('labels[1].value','April 2, 2026');
$json->UpdateString('labels[2].label','customer');
$json->UpdateString('labels[2].value','Contoso Ltd');
$json->UpdateString('labels[3].label','Total Due:');
$json->UpdateString('labels[3].value','$1,999.99');

$jsonOut = new COM("Chilkat.JsonObject");
$success = $pdf->TextReplace('apply',$json,$jsonOut);
if ($success == 0) {
    print 'Not applied: ' . $jsonOut->emit() . "\n";
    if ($success == 0) {
        print $pdf->LastErrorText . "\n";
        exit;
    }

}

$i = 0;
$count_i = $jsonOut->SizeOfArray('replacements');
while ($i < $count_i) {
    $jsonOut->I = $i;
    print 'Replaced the value of \'' . $jsonOut->stringOf('replacements[i].label') . '\' on page ' . $jsonOut->stringOf('replacements[i].pages') . "\n";
    $i = $i + 1;
}

$success = $pdf->WriteFile('qa_output/invoice_reissued.pdf');
if ($success == 0) {
    print $pdf->LastErrorText . "\n";
    exit;
}

//  Read the new values back with ExtractText's label option.
$jsonRead = new COM("Chilkat.JsonObject");
$jsonText = new COM("Chilkat.JsonObject");
$jsonRead->UpdateString('label','Total Due');
$jsonRead->UpdateString('labelValue','right');
$success = $pdf->ExtractText('text',$jsonRead,$jsonText);
if ($success == 0) {
    print $pdf->LastErrorText . "\n";
    exit;
}

print 'Total Due is now: ' . $jsonText->stringOf('text') . "\n";

//  Sample output:

//  Replaced the value of "Invoice Number:" on page 1
//  Replaced the value of "Invoice Date:" on page 1
//  Replaced the value of "customer" on page 1
//  Replaced the value of "Total Due:" on page 1
//  Total Due is now: $1,999.99

?>