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@ 2015-09-07T13:07:20Z

<?php
$characters = ["A", "1", "\u{2603}"];
foreach ($characters as $character) {
    var_dump(IntlChar::isxdigit($character));
}
?>

Output
Performance
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var_dump: documentation ( source)

preferences:dark modelive preview

75.13 ms | 402 KiB | 5 Q