验证字符串是否是汉字
<?php
function checkChinese($str, $min, $max)
{
preg_match_all('/./us', $str, $match);
$len = count($match[0]);
if (!preg_match('/^[\x{4e00}-\x{9fa5}]+$/u', $str) || $len > $max || $len < $min) {
return false;
} else {
return true;
}
}
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