<?php // PHP 7.3.x $result=idn_to_ascii('.pm--domain.com'); var_dump(intl_get_error_code()); // 66567 var_dump(intl_get_error_message()); // idn_to_ascii: cannot convert to ASCII: U_IDNA_ZERO_LENGTH_LABEL_ERROR // PHP 7.4.x $result=idn_to_ascii('.pm--domain.com.'); var_dump(intl_get_error_code()); // 0 var_dump(intl_get_error_message()); // U_ZERO_ERROR
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