PHP Extension

Eval JavaScript Returning Int

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Demonstrates getting the completion value of a JavaScript that returns an integer. PHP Extension

<?php

include("chilkat.php");

$success = false;

//  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 CkStringBuilder();
$success = $sbScript->LoadFile('js_eval_return_int.js','utf-8');
if ($success == false) {
    print $sbScript->lastErrorText() . "\n";
    exit;
}

$js = new CkJs();
$result = new CkJsonObject();

//  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 == false) {
    print $sbScript->lastErrorText() . "\n";
    exit;
}

$result->put_EmitCompact(false);
print $result->emit() . "\n";

//  Output:

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

?>

JavaScript

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

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