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what is use of “@” in php

{ // deep_execution_view
const authorName = "Ankit Agrawal";
//
const publishDate = "June 23, 2014";

@ is error controller operator in php.if we add this operator before any expression or function then any error generated by that expression or function will be ignored.

eg :

(1)include(‘a.php’);

Warning: include(a.php) [function.include]: failed to open stream: No such file or directory

(2)@include(‘a.php’);

no error or warning

}