PHP @ variables

Question

我從一個網站上看到一段代碼，它在php中。在那個代碼變量前寫@符號是什麼意思 例如：

@hello =「hi」;

Answer 1

@是PHP中的錯誤抑制運算符。

PHP supports one error control operator: the at sign (@). 
When prepended to an expression in PHP, any error messages that might be 
generated by that expression will be ignored. 

編輯：

典型用途包括以下內容：

<?php 
// Usage of the @ symbol in PHP code 

// Typical Example 
$var = @some_function(); 

// Class/Object Example 
$var = @new some_class(); 

// Does NOT Work! 
//$var = new @some_class(); // syntax error 

// Another example. Very slow 
$var = @$some_var; 

?> 

參見下面的鏈接：

http://php.net/manual/en/language.operators.errorcontrol.php

http://michelf.com/weblog/2005/bad-uses-of-the-at-operator/

Answer 2

@不能與沒有$的變量一起使用。這是語法錯誤。