php_sapi_nameReturns the type of interface between web server and PHP
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stringphp_sapi_name
Returns a lowercase string which describes the type of interface between
web server and PHP (Server API, SAPI). In CGI PHP, this string is "cgi",
in mod_php for Apache, this string is "apache" and so
on.
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Returns the interface type, as a lowercase string.
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<function>php_sapi_name</function> example
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PHP_SAPI