---
product: Chilkat
product_version: 11.7.0
language: phpext
language_label: PHP Extension
class: Js
class_name: CkJs
license: bundle
deprecated: false
reference_html: https://www.chilkatsoft.com/refdoc/phpCkJsRef.html
---
# Chilkat Js — PHP Extension — v11.7.0

> Chilkat 11.7.0 · language=phpext · class=Js (CkJs)
> Other versions: replace `11.7.0` in this URL. Other languages: `https://www.chilkatsoft.com/ai-docs/v/11.7.0/<lang>/classes/Js.md`.
> Language-wide rules (install, unlock, error model, strings/bytes): `https://www.chilkatsoft.com/ai-docs/v/11.7.0/phpext/guide.md`.

## Purpose

**Execute sandboxed JavaScript inside an application with controlled access to Chilkat features.**

Use `Chilkat.Js` when an application needs to execute JavaScript internally while retaining control over what the script is allowed to access. By default, scripts run in a closed sandbox with the JavaScript language and standard library available, but without filesystem, network, or Chilkat class access unless the host application explicitly enables those capabilities.

**Embedded JavaScript engine**

Run JavaScript code from inside the host application without launching an external scripting process.

**Sandboxed by default**

Start from a restricted execution environment and selectively expose only the capabilities the script should use.

**Enable Chilkat classes**

Allow scripts to use selected Chilkat classes when the host application wants JavaScript to perform controlled Chilkat operations.

**Filesystem restrictions**

Optionally restrict filesystem access so scripts can read or write only within approved locations.

**Script input and output**

Execute JavaScript, pass data through the host-controlled environment, and retrieve results or diagnostics from the script run.

**Controlled automation**

Use JavaScript as an embedded extension language for application-defined workflows while keeping host resources protected.

**Common pattern:** Create a `Js` object, load or provide the JavaScript code, enable only the Chilkat classes and filesystem locations the script is permitted to use, run the script, and inspect the result or diagnostic output. Use `Chilkat.Js` when the application needs scriptability with a security boundary controlled by the host.

For an extended overview, see [Js Class Overview](https://www.chilkatsoft.com/js_class_overview.asp). Also see [About the Chilkat.Js JavaScript Engine](https://www.chilkatsoft.com/chilkat_javascript_engine.asp).

**Third-Party Notice** This software includes portions of the QuickJS JavaScript engine. Copyright © 2017–2024 Fabrice Bellard. Licensed under the MIT License. The Chilkat Js engine was originally derived from QuickJS, but has been extensively modified.

## Object creation, unlocking and error handling

**Object Creation**

```php
$obj = new CkJs();
```

Call `Global.UnlockBundle` once at the start of the program, before using this or any other Chilkat class. Any string unlocks a fully functional 30-day trial; a purchased unlock code is used in production. See `guide.md` for the exact code in PHP Extension.

How failure is reported depends on the method's return type and is stated in the note under each method below. In every case the diagnostic text is in the `LastErrorText` property of the object whose method was called.

## Members common to every Chilkat class

Documented once per language in `common-members.md`; listed here so this page is self-contained.

| Property | Signature | Access | Meaning |
|---|---|---|---|
| `DebugLogFilePath` | `string debugLogFilePath(); void put_DebugLogFilePath(string strVal);` | read/write | If set to a file path, this property logs the LastErrorText of each Chilkat method or property call to the specified file. |
| `LastErrorHtml` | `(read-only) string lastErrorHtml();` | read-only | Provides HTML-formatted information about the last called method or property. |
| `LastErrorText` | `(read-only) string lastErrorText();` | read-only | Provides plain text information about the last called method or property. |
| `LastErrorXml` | `(read-only) string lastErrorXml();` | read-only | Provides XML-formatted information about the last called method or property. |
| `LastMethodSuccess` | `bool get_LastMethodSuccess() void put_LastMethodSuccess(bool boolVal);` | read/write | Indicates the success or failure of the most recent method call: `true` means success, `false` means failure. |
| `Utf8` | `bool get_Utf8() void put_Utf8(bool boolVal);` | read/write | When set to `true`, all `string` arguments and return values are interpreted as UTF-8 strings. |
| `VerboseLogging` | `bool get_VerboseLogging() void put_VerboseLogging(bool boolVal);` | read/write | If set to `true`, then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. |
| `Version` | `(read-only) string version();` | read-only | Version of the component/library, such as "10.1.0" |

## Member index

| Member | Kind | Signature |
|---|---|---|
| `TimeoutSeconds` | property, read/write | `int get_TimeoutSeconds() void put_TimeoutSeconds(int intVal);` |
| `CallFunction` | method | `bool CallFunction(CkJsonObject $funcJson, CkJsonObject $resultJson);` |
| `ConsoleOutputSb` | method | `void ConsoleOutputSb(CkStringBuilder $sb);` |
| `Eval` | method | `bool Eval(CkStringBuilder $jscript, CkJsonObject $resultJson);` |
| `SetCkPermission` | method | `bool SetCkPermission(string $chilkatClassName, string $permission);` |

## Properties

### Js.TimeoutSeconds

`Chilkat 11.7.0 · phpext · Js · TimeoutSeconds · property · read/write · since 11.4.0`

```php
int get_TimeoutSeconds()

void put_TimeoutSeconds(int intVal);
```

Specify a timeout in seconds to prevent JavaScript from running indefinitely, such as in an infinite loop. By default, the value is 0, meaning no timeout is set and infinite loops will continue forever.

## Methods

### Js.CallFunction

`Chilkat 11.7.0 · phpext · Js · CallFunction · method · since 11.4.0`

```php
bool CallFunction(CkJsonObject $funcJson, CkJsonObject $resultJson);
```

Calls a JavaScript function. The function name and arguments are passed in `funcJson`. The result is returned in `resultJson`.

Returns true for success, false for failure.

Async variant: `CallFunctionAsync` — same arguments, returns a `Task` (see Async variants below).

### Js.ConsoleOutputSb

`Chilkat 11.7.0 · phpext · Js · ConsoleOutputSb · method · since 11.4.0`

```php
void ConsoleOutputSb(CkStringBuilder $sb);
```

Returns the console output in `sb` from the last call to `Eval` .

### Js.Eval

`Chilkat 11.7.0 · phpext · Js · Eval · method · since 11.4.0`

```php
bool Eval(CkStringBuilder $jscript, CkJsonObject $resultJson);
```

Run `jscript` as a script. Return output and errors in `resultJson`.

Returns true for success, false for failure.

Async variant: `EvalAsync` — same arguments, returns a `Task` (see Async variants below).

### Js.SetCkPermission

`Chilkat 11.7.0 · phpext · Js · SetCkPermission · method · since 11.4.0`

```php
bool SetCkPermission(string $chilkatClassName, string $permission);
```

Sets sandbox related permissions for Chilkat objects. The `chilkatClassName` is the name of the Chilkat class (case-insensitive), such as `Http`, `Rest`, `"MailMan"`, `"Ftp2"`, `"Ssh"`, etc. The `chilkatClassName` can also be set to `"all"` to apply the permission to all Chilkat classes.

Possible values for `permission` are:

- `disable` - Your JavaScript code is not allowed to create an instance of the Chilkat class. A JavaScript exception is thrown when trying to create a Chilkat object of a class that is disabled.
- `sandbox` - Objects for the Chilkat class can be instantiated in JavaScript, but they have no read or write access to the local filesystem.
- `readOnly` - Objects for the Chilkat class can be instantiated in JavaScript and have read-only access to the local filesystem.
- `writeOnly` - Objects for the Chilkat class can be instantiated in JavaScript and have write-only access to the local filesystem.
- `readWrite` - Objects for the Chilkat class can be instantiated in JavaScript and have read/write access to the local filesystem.

By default, all Chilkat classes are **disabled**. Your application must enable `"all"` or specific Chilkat classes before calling `Eval` or `CallFunction` .

Returns true for success, false for failure.

## Events and callbacks

This binding has no event callbacks. For progress, percent-done or cancellation use the `*Async` variant of a method and poll the returned `Task` (`PercentDone`, `Finished`, `Cancel`).

## Async variants

Each returns a `Task` instead of the result and takes the same arguments as the synchronous method; run the task, wait for `Finished`, then read the result from the task. No new Async methods are added from 11.7.0 on.

```php
CkTask CallFunctionAsync(CkJsonObject $funcJson, CkJsonObject $resultJson);
CkTask EvalAsync(CkStringBuilder $jscript, CkJsonObject $resultJson);
```

## Related classes

[`JsonObject`](https://www.chilkatsoft.com/ai-docs/v/11.7.0/phpext/classes/JsonObject.md), [`StringBuilder`](https://www.chilkatsoft.com/ai-docs/v/11.7.0/phpext/classes/StringBuilder.md)