How to Install the Chilkat PHP Extension on MAC OS X

1. Download

Chilkat MAC OS X Downloads

The download contains the following files:


2. Decompress and Extract to any Directory

gzip -dc chilkat-9.5.0-php-8.1-x86_64-macosx.tar.gz | tar -xof -

3. (If MacOS Catalina or later) Need Non-Default PHP to Install Extensions

MacOS Catalina (10.15) already comes with PHP located at /usr/bin/php, but it is not possible to install extensions because the extension directory is in a read-only directory tree. The easiest solution is to install PHP via brew and thus the extension directory would be located under /opt/homebrew/lib/php/pecl where it is possible to copy files. To install PHP via brew:

brew install php@8.1
brew link php

For more information about installing PHP on MacOS Catalina, Google install php extension mac catalina

3. (If MacOS Version Older than Catalina) Copy to the PHP extensions directory.

To find the path of the PHP extensions directory, run the showExtDir.php script:

php showExtDir.php

A typical extension directory path is /usr/local/lib/php/pecl/20160303. If PHP was installed via brew then a typical extension directory could be /opt/homebrew/lib/php/pecl/20210902. Many other possibilities exist.

It may be that the extensions directory does not yet exist. If so, create the directory. Make sure to use your PHP extensions directory, which may or may not be the same as what is shown here:

sudo mkdir /usr/local/lib/php/pecl/20160303

Now that the extensions directory exists, copy the chilkat shared library to it:

sudo cp /usr/local/lib/php/pecl/20160303

4. Edit php.ini.default to Automatically Load the Chilkat Extension

Find the location of the php.ini file with this command (run from the directory where Chilkat PHP was unpacked)

php phpinfo.php | grep php.ini

Another way of finding the location of php.ini is with this command:

php --ini

You will need to be root to edit the php.ini.
Open the php.ini and locate the "Dynamic Extensions" section. Add the following line:

4. Run test.php to Verify

Run the test.php script to verify that the Chilkat extension is properly installed:

php test.php

The test.php script encrypts and decrypts a string. If successful, the output will look like this:

The quick brown fox jumps over the lazy dog.

5. Use Chilkat in your PHP Scripts

To use Chilkat in your PHP scripts, include "chilkat_9_5_0.php" like this: