Here’s how the error may look like: PHP Unknown: idn_to_utf8(): INTL_IDNA_VARIANT_2003 is deprecated PHP Unknown: idn_to_ascii(): INTL_IDNA_VARIANT_2003 is deprecated The cause is the 2003 version got deprecated and you’re supposed to be using UTS46. Most likely though, you were today years old when you first learned about these. PHP is picking one by default, and… Continue reading What’s up with “PHP Unknown: INTL_IDNA_VARIANT_2003 is deprecated”?