Perl Requires Chilkat v11.7.0+

Replace PDF Text on Selected Pages Only

See more PDF Text Replacement Examples

Demonstrates the "pages" option, which limits the search for placeholders and labels to the given pages: "all" (the default), "first", "last", "odd", "even", or a list such as "1,3,5-9". The two-page order confirmation carries the same "Status:" label on both pages; the status is changed on page 2 only, then on both pages. Perl

use chilkat();

$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 order_confirmation.pdf

$pdf = chilkat::CkPdf->new();
$success = $pdf->LoadFile("qa_data/pdf/order_confirmation.pdf");
if ($success == 0) {
    print $pdf->lastErrorText() . "\r\n";
    exit;
}

$json = chilkat::CkJsonObject->new();
$jsonOut = chilkat::CkJsonObject->new();

#  Both pages have "Status:   Pending".  With pages "2", only page 2 is searched.
$json->UpdateString("pages","2");
$json->UpdateString("labels[0].label","Status:");
$json->UpdateString("labels[0].value","Shipped");
$success = $pdf->TextReplace("check",$json,$jsonOut);
if ($success == 0) {
    print $pdf->lastErrorText() . "\r\n";
    exit;
}

print "pages 2: found on page(s) " . $jsonOut->stringOf("replacements[0].pages") . "\r\n";

#  With every page searched, the default occurrence ("first") still replaces one -- the first in reading order.
$json->UpdateString("pages","all");
$success = $pdf->TextReplace("check",$json,$jsonOut);
if ($success == 0) {
    print $pdf->lastErrorText() . "\r\n";
    exit;
}

print "pages all, first occurrence: found on page(s) " . $jsonOut->stringOf("replacements[0].pages") . "\r\n";

#  Every occurrence on every page.
$json->UpdateString("labels[0].occurrence","all");
$success = $pdf->TextReplace("apply",$json,$jsonOut);
if ($success == 0) {
    print $pdf->lastErrorText() . "\r\n";
    exit;
}

print "pages all, every occurrence: " . $jsonOut->IntOf("replacements[0].count") . " replaced on page(s) " . $jsonOut->stringOf("replacements[0].pages") . "\r\n";

$success = $pdf->WriteFile("qa_output/order_shipped.pdf");
if ($success == 0) {
    print $pdf->lastErrorText() . "\r\n";
    exit;
}

#  Sample output:

#  pages 2: found on page(s) 2
#  pages all, first occurrence: found on page(s) 1
#  pages all, every occurrence: 2 replaced on page(s) 1,2