PHP Requires Chilkat v11.4.0+

Eval JavaScript Returning String

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Demonstrates getting the completion value of a JavaScript that returns a string. Chilkat2 PHP

<?php

use Chilkat2\Js;
use Chilkat2\JsonObject;
use Chilkat2\StringBuilder;

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

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

// Load the JavaScript from a file.
$sbScript = new StringBuilder();
try {
    $sbScript->LoadFile('js_eval_return_string.js', 'utf-8');

    $js = new Js();
    $result = new 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 a string.
    $js->Eval($sbScript, $result);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

$result->EmitCompact = false;
echo $result->Emit(), "\n";

// Output:

// {
//   "type": "string",
//   "value": "Ready for Chilkat.Js"
// }

JavaScript

var status = "Ready";
var system = "Chilkat.Js";

// The last statement is an expression
status + " for " + system;