Requirements

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## Requirements

pthreads requires a build of PHP with ZTS (Zend Thread Safety) enabled (--enable-zts, or on non-Windows systems prior to PHP 8.0.0, --enable-maintainer-zts)

Caution

Zend Thread Safety cannot be enabled post build; it is a build time configuration option.

pthreads should build anywhere there is a working Posix Threads header (pthread.h) and ZTS build of PHP, including Windows (using the pthread-w32 project from redhat).