PHP Requires Chilkat v11.7.0+

Why a PDF Optimization Was Skipped

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Demonstrates the "skipped" array, which lists the options that were asked for but not applied, each with a reason and, where it is page-specific, the pages. An option is skipped when it is reserved for a later release (mergeFontSubsets, compactType1Fonts), when the rules of the file forbid it (objectStreams in a PDF/A-1 file), or when the content could not be parsed safely (tidyContent and coalesceContent on a page whose content stream the parser does not understand). Nothing is ever changed on a guess: an option that cannot be applied safely is skipped and reported. Chilkat2 PHP

<?php

use Chilkat2\JsonObject;
use Chilkat2\Pdf;

// 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 grand_canyon_hiking_guide.pdf

$pdf = new Pdf();
try {
    $pdf->LoadFile('qa_data/pdf/grand_canyon_hiking_guide.pdf');

    // Ask for the two options that are reserved for a later release.
    $json = new JsonObject();
    $json->UpdateBool('mergeFontSubsets', true);
    $json->UpdateBool('compactType1Fonts', true);

    $jsonOut = new JsonObject();
    $pdf->Optimize('audit', $json, $jsonOut);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

$i = 0;
$numSkipped = $jsonOut->SizeOfArray('skipped');
echo 'skipped: ', $numSkipped, "\n";
while ($i < $numSkipped) {
    $jsonOut->I = $i;
    echo '   ', $jsonOut->StringOf('skipped[i].option'), ' - ', $jsonOut->StringOf('skipped[i].reason'), "\n";
    $i = $i + 1;
}

// A skipped option is not a failure: Optimize returns true, the other options are applied, and the
// report says exactly what was left undone.