下面要提供二款php 中英文混合文本截取字符串函数,这款字符串截取函数都是自于不同的cms一款是dede字符串截取函数,一款是phpcms的,现在拿来给各位使用啊。
代码如下 | 复制代码 |
function str_cut($string, $length, $dot = '...') { $strlen = strlen($string); if($strlen $string = str_replace(array(' ', '&', '"', ''', '“', '”', '—', '', '·', '…'), array(' ', '&', '"', "'", '“', '”', '—', '', '·', '…'), $string); $strcut = ''; if(strtolower(charset) == 'utf-8') { $n = $tn = $noc = 0; while($n { $t = ord($string[$n]); if($t == 9 || $t == 10 || (32 $tn = 1; $n++; $noc++; } elseif(194 $tn = 2; $n += 2; $noc += 2; } elseif(224 $tn = 3; $n += 3; $noc += 2; } elseif(240 $tn = 4; $n += 4; $noc += 2; } elseif(248 $tn = 5; $n += 5; $noc += 2; } elseif($t == 252 || $t == 253) { $tn = 6; $n += 6; $noc += 2; } else { $n++; } if($noc >= $length) break; } if($noc > $length) $n -= $tn; $strcut = substr($string, 0, $n); } else { $dotlen = strlen($dot); $maxi = $length - $dotlen - 1; for($i = 0; $i { $strcut .= ord($string[$i]) > 127 ? $string[$i].$string[++$i] : $string[$i]; } } $strcut = str_replace(array('&', '"', "'", ''), array('&', '"', ''', ''), $strcut); return $strcut.$dot; } |
方法二
//中文截取2,单字节截取模式
//如果是request的内容,必须使用这个函数
代码如下 | 复制代码 |
function cn_substrr($str,$slen,$startdd=0) { $str = cn_substr(strips教程lashes($str),$slen,$startdd); return addslashes($str); } //中文截取2,单字节截取模式 function cn_substr($str,$slen,$startdd=0) { global $cfg_soft_lang; if($cfg_soft_lang=='utf-8') { return cn_substr_utf8($str,$slen,$startdd); } $restr = ''; $c = ''; $str_len = strlen($str); if($str_len { return ''; } if($str_len { $slen = $str_len - $startdd; } $enddd = $startdd + $slen - 1; for($i=0;$i { if($startdd==0) { $restr .= $c; } else if($i > $startdd) { $restr .= $c; } if(ord($str[$i])>0x80) { if($str_len>$i+1) { $c = $str[$i].$str[$i+1]; } $i++; } else { $c = $str[$i]; } if($i >= $enddd) { if(strlen($restr)+strlen($c)>$slen) { break; } else { $restr .= $c; break; } } } return $restr; } //utf-8中文截取,单字节截取模式 function cn_substr_utf8($str, $length, $start=0) { if(strlen($str) { return ''; } preg_match_all("/./su", $str, $ar); $str = ''; $tstr = ''; //为了兼容mysql教程4.1以下版本,与数据库教程varchar一致,这里使用按字节截取 for($i=0; isset($ar[0][$i]); $i++) { if(strlen($tstr) { $tstr .= $ar[0][$i]; } else { if(strlen($str) { $str .= $ar[0][$i]; } else { break; } } } return $str; } |
上面二款字符串截取函数有一个相同点,他就是全部支持中英文混体文本,也都是判断asc码值进行区别那个是汉字,那个是中文,以及是utf8还是gbk等。

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