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run code in 300+ PHP versions simultaneously
<?php var_dump( $conv = mb_convert_encoding( $bin = hex2bin("1b284200"), "UTF-8", "CP50220" ), mb_check_encoding($bin, "CP50220"), bin2hex(mb_convert_encoding($conv, "CP50220", "UTF-8")) );
Output for 8.1.0 - 8.1.13, 8.2rc1 - rc3
string(1) "" bool(true) string(2) "00"
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.26
string(1) "" bool(false) string(2) "00"

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