(PHP ActiveX) Eval JavaScript Returning Int

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Note: This example requires Chilkat v11.4.0 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

$success = 0;

// This example demonstrates getting the completion value of a script,
// where the last evaluated expression is an integer.

// The Javascript run in this example is shown below.

// Load the JavaScript from a file.
$sbScript = new COM("Chilkat.StringBuilder");
$success = $sbScript->LoadFile('js_eval_return_int.js','utf-8');
if ($success == 0) {
    print $sbScript->LastErrorText . "\n";
    exit;
}

$js = new COM("Chilkat.Js");
$result = new COM("Chilkat.JsonObject");

// Run the JavaScript
// Eval returns the completion value of the script. This is generally the value of the last evaluated expression.
// In this case, the last evaluated expression is an int.
$success = $js->Eval($sbScript,$result);
if ($success == 0) {
    print $sbScript->LastErrorText . "\n";
    exit;
}

$result->EmitCompact = 0;
print $result->emit() . "\n";

// Output:

// {
//   "type": "int",
//   "value": 42
// }

?>

const base = 10;
const multiplier = 4;
const offset = 2;

// The last line is a calculation resulting in an integer
// Returns 42.
(base * multiplier) + offset;