How does PHP handle special characters and non-English characters in variable names?

PHP allows special characters and non-English characters in variable names by using variable variables or curly braces around the variable name. This can be useful when working with multilingual applications or when needing to use special characters in variable names. However, it is important to be cautious when using these characters to ensure code readability and maintainability. 

// Using variable variables with special characters
${'var!@#'} = 'Hello';
echo ${'var!@#'}; // Output: Hello

// Using curly braces with non-English characters
$变量 = 'World';
echo ${'变量'}; // Output: World

Keywords

UTF-8 multibyte mbstring htmlspecialchars htmlentities

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