Upgrade PHP or ChartDirector

1. Record PHP, ChartDirector and APPX versions, package hashes, php.ini and chart parameters.
2. Stage the new PHP or complete ChartDirector library in a separate directory.
3. Select the extension for the new PHP minor version and thread-safety setting.
4. Run the standalone test as the APPX identity.
5. Re-run a 1CD sample, an application chart and a PDF report. Compare data, labels and dimensions.
6. Switch the controlled executable or library setting and establish new sessions.
7. Keep the prior installation until rollback has been checked.

A maintenance update within the same PHP minor version uses that extension family: PHP 8.3 uses the 830 extension, and PHP 8.5 uses 850. A move to a different PHP minor release requires a matching vendor extension and repeat the checks. Keep the wrapper phpchartdir.php and native libraries from the same ChartDirector distribution.