PHP Requires Chilkat v11.4.0+

Call a JavaScript Function Returning an Object

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Demonstrates how to call a JavaScript function that returns an object. Chilkat2 PHP

<?php

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

// This is the JavaScript function we'll call:

// function getSettings() {
//     return {
//         theme: "dark",
//         notifications: true,
//         version: 1.0
//     };
// }

$sbScript = new StringBuilder();
$sbScript->Append('function getSettings() {');
$sbScript->Append('    return {');
$sbScript->Append('        theme: "dark",');
$sbScript->Append('        notifications: true,');
$sbScript->Append('        version: 1.0');
$sbScript->Append('    };');
$sbScript->Append('}');

$js = new Js();

$result = new JsonObject();
$result->EmitCompact = false;

// Call Eval to add the function to the context's global object
try {
    $js->Eval($sbScript, $result);

    // ------------------------------------------------------------------------------
    // Call the function getSettings()

    $funcCall = new JsonObject();

    // Create JSON specifying the function name and arguments
    // The function has no arguments, so we only specify the name.

    // {
    //   "name": "getSettings",
    // }

    $funcCall->UpdateString('name', 'getSettings');

    $js->CallFunction($funcCall, $result);
} catch (\Chilkat2\Exception $e) {
    // Examine the result for an exception.
    echo $result->Emit(), "\n";

    // Also examine the LastErrorText.
    echo $e->getMessage(), "\n";
    exit;
}

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

// Output:
// {
//   "type": "object",
//   "value": {
//     "theme": "dark",
//     "notifications": true,
//     "version": 1
//   }
// }

// Examine the object's members
echo 'theme: ', $result->StringOf('value.theme'), "\n";
echo 'notifications: ', ($result->BoolOf('value.notifications') ? 'true' : 'false'), "\n";
echo 'version: ', $result->IntOf('value.version'), "\n";

// Output:
// theme: dark
// notifications: True
// version: 1