php-doc-en/reference/info/functions/php-sapi-name.xml

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  <refentry id="function.php-sapi-name">
   <refnamediv>
    <refname>php_sapi_name</refname>
    <refpurpose>
     Returns the type of interface between web server and PHP
    </refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
     <methodsynopsis>
      <type>string</type><methodname>php_sapi_name</methodname>
      <void/>
     </methodsynopsis>
    <simpara>
     <function>php_sapi_name</function> 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.
    </simpara>
    <para>
     <example>
      <title><function>php_sapi_name</function> example</title>
      <programlisting role="php">
<![CDATA[
<?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";
}
?>
]]>
      </programlisting>
     </example>
    </para>
    <para>
     See also <link linkend="reserved.constants.core">PHP_SAPI</link>.
    </para>
   </refsect1>
  </refentry>

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