php_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.

Example 1. php_sapi_name() example

 <?php
$sapi_type = php_sapi_name();
if ($sapi_type == "cgi") {
    echo "You are using CGI PHP\n";
} else {
    echo "You are not using CGI PHP\n";
}
?>

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