php_sapi_name

(PHP 4 >= 4.0.1, PHP 5, PHP 7, PHP 8)

php_sapi_name — Returns the type of interface between web server and PHP

Description

function php_sapi_name(): string|false

Returns a lowercase string that describes the type of interface (the Server API, SAPI) that PHP is using. For example, in CLI PHP this string will be "cli" whereas with Apache it may have several different values depending on the exact SAPI used. Possible values are listed below.

Parameters

This function has no parameters.

Return Values

Returns the interface type, as a lowercase string, or false on failure.

Although not exhaustive, the possible return values include apache, apache2handler, cgi (until PHP 5.3), cgi-fcgi, cli, cli-server, embed, fpm-fcgi, litespeed, phpdbg.

Examples

Example #1 php_sapi_name() example

This example checks for the substring cgi because it may also be cgi-fcgi.

<?php
$sapi_type = php_sapi_name();
if (substr($sapi_type, 0, 3) == 'cgi') {
    echo "You are using CGI PHP\n";
} else {
    echo "You are not using CGI PHP\n";
}
?>

Notes

Note: An alternative approach

The PHP constant PHP_SAPI has the same value as php_sapi_name().

Tip

A potential gotcha

The defined SAPI may not be obvious, because for example instead of apache it may be defined as apache2handler.