- version_compare: documentation ( source)
- preg_match: documentation ( source)
<?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
?>