检测字符串是否为UTF8编码
- WBOYOriginal
- 2016-06-07 11:45:481285browse
/**<br>
* 检测字符串是否为UTF8编码<br>
* @param string $str 被检测的字符串<br>
* @return boolean <br>
*/<br>
function is_utf8($str){<br>
$len = strlen($str); <br>
for($i = 0; $i
$c = ord($str[$i]); <br>
if ($c > 128) { <br>
if (($c > 247)) return false; <br>
elseif ($c > 239) $bytes = 4; <br>
elseif ($c > 223) $bytes = 3; <br>
elseif ($c > 191) $bytes = 2; <br>
else return false; <br>
if (($i + $bytes) > $len) return false; <br>
while ($bytes > 1) { <br>
$i++; <br>
$b = ord($str[$i]); <br>
if ($b 191) return false; <br>
$bytes--; <br>
} <br>
} <br>
} <br>
return true;<br>
} AD：真正免费，域名+虚机+企业邮箱=0元
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