PHP @ at Mark function, phpat Mark function _ PHP Tutorial

PHP @ at Mark and phpat mark. PHP @ at Mark function. phpat Mark function depends on the PHP code. some lines always have the @ symbol at the front of the line, and I don't know what it means. For example, dede5.7 @ $ niimagecreatetruecolor ($ ftoW, $ ftoH), PHP @ at, and phpat

Looking at PHP code, there is always a @ symbol on the front of some lines, and I don't know what it means. For example, dede5.7 @ $ ni = imagecreatetruecolor ($ ftoW, $ ftoH );

I used it today. just remember it. In fact, it is an error control character, that is, even if an error occurs, it ignores the error message and continues to execute the following code.

@$page=$_GET['page']?intval($_GET['page']):1;

This is the value of the page keyword obtained from the URL, such as "index. php? Page = 5 ", $ page will get 5.

However, if there is an error, such as "index. php "does not have the page keyword. if $ _ GET ['Page'] does not exist, an error is returned. if @ is returned, this small error can be ignored.

For example:

$conn = mysqli_conncet("q","w","e","r");

In this case, an error message is entered about database connection.

If @ is added before $ conn, the error message will not be output.

@$conn = mysqli_conncet("q","w","e","r");

Remember here.

Functions of php function addition & [at]

For reference.

[Php] Why is @ (at) added before some functions)

So that no error information is output to the page during function execution.

For example
Require (DISCUZ_ROOT. './forumdata/cache/cache_settings.php ');
If the cache_settings.php file cannot be found, an error will be reported.
However, if @ is added, no error will be reported.

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