<?php // \u{...} syntax is only allowed in PHP 7+ version_compare(PHP_VERSION, "7.0", ">=") || die; $RegularExpression = "/^[a-z\u{0430}-\u{044F}]+$/iu"; $TestStrArray = array('ABC', 'abc', "\u{0410}\u{0411}\u{0412}", "\u{0430}\u{0431}\u{0432}"); foreach ($TestStrArray as $TestStr) { $Result = preg_match($RegularExpression, $TestStr); echo $TestStr; if ($Result === false) { echo ' - Error'."\r\n"; } else { echo ' - '.($Result === 0 ? 'not found' : 'found')."\r\n"; } } // foreach ?>
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