PHP 4 for Windows comes in two flavours - a CGI executable (php.exe),
and several SAPI modules (for exapmle php4isapi.dll). The latter form
is new to PHP 4, and provides significantly improved performance and
some new functionality. However, please note that the SAPI modules
are *NOT* yet considered to be production quality.
In particular, with the ISAPI module, you are likely to encounter serious
reliability problems especially on platforms older than W2K - you may
witness a lot of server 500 errors and suffer from other server modules
such as ASP also failing. You have been warned! The reason for this is that the PHP SAPI modules are using the
thread-safe version of the PHP code, which is new to PHP 4, and has
not yet been tested and pounded enough to be considered completely
stable, and there are actually a few known bugs. On the other hand,
some people have reported very good results with the SAPI modules,
and there a few reports of problems with the Apache module version.
In short - your mileage may vary; If you need
absolute stability, trade the performance of the SAPI modules
with the stability of the CGI executable.
and several SAPI modules (for exapmle php4isapi.dll). The latter form
is new to PHP 4, and provides significantly improved performance and
some new functionality. However, please note that the SAPI modules
are *NOT* yet considered to be production quality.
In particular, with the ISAPI module, you are likely to encounter serious
reliability problems especially on platforms older than W2K - you may
witness a lot of server 500 errors and suffer from other server modules
such as ASP also failing. You have been warned! The reason for this is that the PHP SAPI modules are using the
thread-safe version of the PHP code, which is new to PHP 4, and has
not yet been tested and pounded enough to be considered completely
stable, and there are actually a few known bugs. On the other hand,
some people have reported very good results with the SAPI modules,
and there a few reports of problems with the Apache module version.
In short - your mileage may vary; If you need
absolute stability, trade the performance of the SAPI modules
with the stability of the CGI executable.
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