PHP Extension Requires Chilkat v11.4.0+

Call a JavaScript Function Returning a String

See more JavaScript Examples

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!

?>