What is the use of 'echo' in <? PHP echo $_SERVER ['PHP_SELF']? >? It works without it, but what is “echo” doing here? - Quora
Php & Web Developer - PHP super Globle.. $_SERVER['PHP_SELF'] Returns the filename of the currently executing script $_SERVER['GATEWAY_INTERFACE'] Returns the version of the Common Gateway Interface (CGI) the server is using $_SERVER['SERVER_ADDR']
![Reflected Site Scripting(XSS) - Multiple ($_SERVER['PHP_SELF']) (1) · Issue #2450 · ZoneMinder/zoneminder · GitHub Reflected Site Scripting(XSS) - Multiple ($_SERVER['PHP_SELF']) (1) · Issue #2450 · ZoneMinder/zoneminder · GitHub](https://user-images.githubusercontent.com/47003572/51703531-93b8d000-203c-11e9-9bb6-97cfb33c70af.png)