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idn_to_ascii()

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<?php
$string 
idn_to_ascii (
    
// string $domain
    
// [int $options = 0]
    
?// [int $variant = INTL_IDNA_VARIANT_2003]
    
  // [array &$idna_info]
);
?>
Result
$string = 'xn--tst-qla.de'
Examples
#1 idn_to_ascii  ("täst.de")
See also
idn_to_utf8