What is the purpose of masking the @ symbol in PHP variables?

Masking the @ symbol in PHP variables is necessary when the variable name itself contains the @ symbol. This is because the @ symbol is a special character in PHP that is used for error control. When using a variable with the @ symbol in its name, PHP will interpret it as an error control operator rather than as part of the variable name. To avoid this issue, the @ symbol needs to be escaped or masked in the variable name.

${'my_variable@'} = 'value';
echo ${'my_variable@'}; // Output: value