How can using Umlauts in variable names affect the functionality of PHP code?

Using Umlauts in variable names can lead to unexpected behavior in PHP code because PHP may not recognize these characters as valid variable names. To avoid any issues, it is recommended to stick to using standard ASCII characters in variable names. 

// Incorrect variable name with Umlaut
$währung = "Euro";

// Correct variable name without Umlaut
$waehrung = "Euro";

Keywords

Umlauts variable names functionality PHP code character encoding

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