PHP Extension

Call a JavaScript Function Returning a String

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Demonstrates how to call a JavaScript function that returns a string. PHP Extension

<?php

include("chilkat.php");

$success = false;

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

// function greet(name) {
//     return "Hello, " + name + "!";
// }

$sbScript = new CkStringBuilder();
$sbScript->Append('function greet(name) { return \'Hello, \' + name + \'!\'; }');

$js = new CkJs();

$result = new CkJsonObject();
$result->put_EmitCompact(false);

// Call Eval to add the function to the context's global object
$success = $js->Eval($sbScript,$result);
if ($success == false) {
    // Examine the result for an exception.
    print $result->emit() . "\n";

    // Also examine the LastErrorText.
    print $js->lastErrorText() . "\n";
    exit;
}

// ------------------------------------------------------------------------------
// Call the function greet("Michael")

$funcCall = new CkJsonObject();

// Create JSON specifying the function name and arguments

// {
//   "name": "greet",
//   "args": [ "Michael" ]
// }

$funcCall->UpdateString('name','greet');
$funcCall->UpdateString('args[0]','Michael');

$success = $js->CallFunction($funcCall,$result);
if ($success == false) {
    // Examine the result for an exception.
    print $result->emit() . "\n";

    // Also examine the LastErrorText.
    print $js->lastErrorText() . "\n";
    exit;
}

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

// Output:
// {
//   "type": "string",
//   "value": "Hello, Michael!"
// }

$retval = $result->stringOf('value');
print $retval . "\n";

// Output:
// Hello, Michael!

?>