(PHP Extension) File Read Blocks

Demonstrates how to read a file in fixed-size blocks (except for the very last block).

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

// Demonstrates how to read a file in blocks,
// which can be useful when uploading to cloud storage
// services such as Azure, S3, Google, etc.

// For this example, we're simply writing the blocks
// to an output file, and then checking to see if the
// resulting file contents equals the original file contents.

$dataBlock = new CkByteData();

$facSrc = new CkFileAccess();
$facDest = new CkFileAccess();

$srcPath = 'qa_data/xml/hamlet.xml';
$destPath = 'qa_output/hamletOut.xml';

$success = $facSrc->OpenForRead($srcPath);
$success = $facDest->OpenForWrite($destPath);
// Assuming success for the example..

// How many 1024-byte blocks?  (Including 1 for the last partial block)
$numBlocks = $facSrc->GetNumBlocks(1024);

$i = 0;
while (($i < $numBlocks)) {
    $success = $facSrc->ReadBlock($i,1024,$dataBlock);
    if ($facSrc->get_LastMethodSuccess() != true) {
        print $facSrc->lastErrorText() . "\n";
        exit;
    }

    $success = $facDest->FileWrite($dataBlock);
    if ($success != true) {
        print $facDest->lastErrorText() . "\n";
        exit;
    }

    $i = $i + 1;
}

$facSrc->FileClose();
$facDest->FileClose();

$bEqual = $facSrc->FileContentsEqual($srcPath,$destPath);
if ($bEqual != true) {
    print 'Something went wrong!' . "\n";
    exit;
}

print 'File successfully copied by blocks.' . "\n";

?>