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There are two techniques to use.  The first is a quick check of the QHTTPSVR subsystem to verify no Apache instances have a lock on php-cgi.bin.  The second uses the QP0FPTOS API to verify that no process is using php-cgi.bin and that no process is using php.bin.

For Zend Server versions 9.x and higher, including Zend Server 2018.0.x and 2019.0.x:

Part 1 - Verify no Apache instances have php-cgi.bin locked:

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