(PHP Extension) Decode 2-digit Hex Escaped

Demonstrates how to replace escaped us-ascii chars such as \x7b and \x22 with the chars.

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");

// We have the following string with some us-ascii chars escaped like this:
$s = '\x7b\x22responseContext\x22:\x7b\x22';

// Note: The above escaping does not conform to any standard format (as far as I know).
// Chilkat does not have anything to decode from the above.
// However, we can 1st transform into a standard format, and then decode..

// JSON escapes chars outside us-ascii like this:  "Hello, \ud83d\ude03!"
// We can transform the above to this:  "\u007b\u0022responseContext\u0022:\u007b\u0022"
// And then decode..

$sb = new CkStringBuilder();

$sb->Append($s);
$numReplaced = $sb->Replace('\\x','\\u00');

// Now decode from "json" escapes
$sb->Decode('json','utf-8');

// Show the decoded string
print $sb->getAsString() . "\n";

// Here's the result: {"responseContext":{"

?>