-
-
//字符串截取
- $a = "s@@你好";
- var_dump(strlen_weibo($a,'utf-8'));
- 结果输出为8,其中字母s计数为1,全角@计数为2,半角@计数为1,两个中文计数为4。源码如下:
//截取字符串的函数代码
- function strlen_weibo($string, $charset='utf-8')
- {
- $n = $count = 0;
- $length = strlen($string);
- if (strtolower($charset) == 'utf-8')
- {
- while ($n {
- $currentByte = ord($string[$n]);
- if ($currentByte == 9 ||
- $currentByte == 10 ||
- (32 {
- $n++;
- $count++;
- } elseif (194 {
- $n += 2;
- $count += 2;
- } elseif (224 {
- $n += 3;
- $count += 2;
- } elseif (240 {
- $n += 4;
- $count += 2;
- } elseif (248 {
- $n += 5;
- $count += 2;
- } elseif ($currentByte == 252 || $currentByte == 253)
- {
- $n += 6;
- $count += 2;
- } else
- {
- $n++;
- $count++;
- }
- if ($count >= $length)
- {
- break;
- }
- }
- return $count;
- } else
- {
- for ($i = 0; $i {
- if (ord($string[$i]) > 127)
- {
- $i++;
- $count++;
- }
- $count++;
- }
- return $count;
- }
- }
-
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