(PHP Extension) Convert a File's Character Encoding from UTF-8 to UFT-8-BOM

To add a utf-8 BOM to a file is just a matter of prepending these 3 bytes to the file: 0xEF 0xBB 0xBF.

This may be difficult in some programming languages, or it may be trivial in either. Therefore, the Chilkat solution you see here might be helpful, or in a language such as C++, the Chilkat solution isn't really necessary because it's easy to do yourself.

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");

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

$charset = new CkCharset();

$charset->put_FromCharset('utf-8');
$charset->put_ToCharset('bom-utf-8');

$success = $charset->ConvertFile('qa_data/txt/helloWorld.txt','qa_output/helloWorldBom.txt');
if ($success != true) {
    print $charset->lastErrorText() . "\n";
    exit;
}

print 'Success.' . "\n";

?>