请问下面这段防止截错字符的程序是什么原理? 建议使用mb_substr函数该函数属于mbstring函数库,提供了全套双字节字符串的操作。 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 找不到这个mb_substr函数的资料,在php4中文手册。 if (strlen($str)>42){ //防止截错字符 if(ord(substr($str,$i,1))>0xa0) $str=substr($str,0,41).".."; else $str=substr($str,0,40)."..";}这样行不行? 好像得服务器有加载那个函数先吧?另外,mb_substr()如果和substr差不多的话,那截取的时候,如果遇到汉字,它是少取一位还是多取一位? if (strlen($str)>42){ //防止截错字符 if(ord(substr($str,0,1))>0xa0) $str=substr($str,0,41).".."; else $str=substr($str,0,40)."..";}是这样,行否? 中英文混合的情况下,或在半角标点的情况下,if(ord(substr($str,0,1))>0xa0) 是不会通过的吧? 如果$str的第一位是汉字,ord(substr($str,0,1))>0xa0返回为真.如果$str="china 中华人民共和国";这个字串你该怎么做?用上面我提供的函数substr_for_gb2312($str,$start,$len=null)就行了 加载mbstring函数库$s = mb_substr($text,0,40);即可不愿意加载或不能加载可以:<?/* 中文处理工具函数 2000-06-06 --- 空格 --- string GBspace(string) --------- 每个中文字之间加空格 string GBunspace(string) ------- 每个中文字之间的空格清除 string clear_space(string) ------- 用来清除多余的空格--- 转换 --- string GBcase(string,offset) --- 将字符串内的中英文字转换大小写 offset : "upper" - 字符串全转为大写 (strtoupper) "lower" - 字符串全转为小写 (strtolower) "ucwords" - 将字符串每个字第一个字母改大写 (ucwords) "ucfirst" - 将字符串第一个字母改大写 (ucfirst) string GBrev(string) ----------- 颠倒字符串--- 文字检查 --- int GB_check(string) ----------- 检查字符串内是否有 GB 字,有会返回 true, 否则会返回false int GB_all(string) ------------- 检查字符串内所有字是否有 GB 字,是会返回 true, 否则会返回false int GB_non(string) ------------- 检查字符串内所有字并不是 GB 字,是会返回 true, 否则会返回false int GBlen(string) -------------- 返回字符串长度(中文字只计一字母)--- 查找、取代、提取 --- int/array GBpos(haystack,needle,[offset]) ---- 查找字符串 (strpos) offset : 留空 - 查找第一个出现的位置 int - 由该位置搜索出现的第一个位置 "r" - 查找最后一次出现的位置 (strrpos) "a" - 将所有查找到的字储存为数组(返回 array) string GB_replace(needle,str,haystack) -- 查找与取代字符串 (str_replace) string GB_replace_i(needle,str_f,str_b,haystack) -- 不检查大小写查找与取代字符串 needle - 查找字母 str - 取代字母 ( str_f - 该字母前, str_b 该字母后) haystack - 字符串 string GBsubstr(string,start,[length]) -- 从string提取出由开始到结尾或长度 length的字符串。 中文字只计一字母,可使用正负数。 string GBstrnear(string,length) -- 从 string提取最接近 length的字符串。 length 中 中文字计2个字母。--- 注意 --- 如使用由 Form 返回的字符串前,请先替字符串经过 stripslashes() 处理,除去多余的 \ 。 用法:在原 PHP 代码内加上: include ("GB.inc"); 即可使用以上工具函数。*/ function GBlen($string) { $l = strlen($string); $ptr = 0; $a = 0; while ($a < $l) { $ch = substr($string,$a,1); $ch2 = substr($string,$a+1,1); if (ord($ch) >= HexDec("0x81") && ord($ch2) >= HexDec("0x40")) { $ptr++; $a += 2; } else { $ptr++; $a++; } // END IF } // END WHILE return $ptr;}function GBsubstr($string,$start,$length) { if (!is_int($length) && $length != "") { return "错误:length 值错误(必须为数值)。<br>"; } elseif ($length == "0") { return ""; } else { $l = strlen($string); $a = 0; $ptr = 0; $str_list = array(); $str_list2 = array(); while ($a < $l) { $ch = substr($string,$a,1); $ch2 = substr($string,$a+1,1); if (ord($ch) >= HexDec("0x81") && ord($ch2) >= HexDec("0x40")) { $str_list[$ptr] = $a; $str_list2[$ptr] = $a+1; $ptr++; $a += 2; } else { $str_list[$ptr] = $a; $str_list2[$ptr] = $a; $ptr++; $a++; } // END IF } // END WHILE if ($start > $ptr || -$start > $ptr) { return; } elseif ($length == "") { if ($start >= 0) { // (text,+) return substr($string,$str_list[$start]); } else { // (test,-) return substr($string,$str_list[$ptr + $start]); } } else { if ($length > 0) { // $length > 0 if ($start >= 0) { // (text,+,+) if (($start + $length) >= count($str_list2)) { return substr($string,$str_list[$start]); } else { //(text,+,+) $end = $str_list2[$start + ($length - 1)] - $str_list[$start] +1; return substr($string,$str_list[$start],$end); } } else { // (text ,-,+) $start = $ptr + $start; if (($start + $length) >= count($str_list2)) { return substr($string,$str_list[$start]); } else { $end = $str_list2[$start + ($length - 1)] - $str_list[$start] +1; return substr($string,$str_list[$start],$end); } } } else { // $length < 0 $end = strlen($string) - $str_list[$ptr+$length]; if ($start >= 0) { // (text,+,-) { return substr($string,$str_list[$start],-$end); } else { //(text,-,-) $start = $ptr + $start; return substr($string,$str_list[$start],-$end); } } // END OF LENGTH > / < 0 } } // END IF}function GB_replace($needle,$string,$haystack) { $l = strlen($haystack); $l2 = strlen($needle); $l3 = strlen($string); $news = ""; $skip = 0; $a = 0; while ($a < $l) { $ch = substr($haystack,$a,1); $ch2 = substr($haystack,$a+1,1); if (ord($ch) >= HexDec("0x81") && ord($ch2) >= HexDec("0x40")) { if (substr($haystack,$a,$l2) == $needle) { $news .= $string; $a += $l2; } else { $news .= $ch.$ch2; $a += 2; } } else { if (substr($haystack,$a,$l2) == $needle) { $news .= $string; $a += $l2; } else { $news .= $ch; $a++; } } // END IF } // END WHILE return $news;}function GB_replace_i($needle,$str_f,$str_b,$haystack) { $l = strlen($haystack); $l2 = strlen($needle); $l3 = strlen($string); $news = ""; $skip = 0; $a = 0; while ($a < $l) { $ch = substr($haystack,$a,1); $ch2 = substr($haystack,$a+1,1); if (ord($ch) >= HexDec("0x81") && ord($ch2) >= HexDec("0x40")) { if (GBcase(substr($haystack,$a,$l2),"lower") == GBcase($needle,"lower")) { $news .= $str_f . substr($haystack,$a,$l2) . $str_b; $a += $l2; } else { $news .= $ch.$ch2; $a += 2; } } else { if (GBcase(substr($haystack,$a,$l2),"lower") == GBcase($needle,"lower")) { $news .= $str_f . substr($haystack,$a,$l2) . $str_b; $a += $l2; } else { $news .= $ch; $a++; } } // END IF } // END WHILE return $news;}function GBpos($haystack,$needle,$offset) { if (!is_int($offset)) { $offset = strtolower($offset); if ($offset != "" && $offset != "r" && $offset != "a") { return "错误:offset 值错误。<br>"; } } $l = strlen($haystack); $l2 = strlen($needle); $found = false; $w = 0; // WORD $a = 0; // START if ($offset == "" || $offset == "r") { $atleast = 0; $value = false; } elseif ($offset == "a") { $value = array(); $atleast = 0; } else { $value = false; $atleast = $offset; } while ($a < $l) { $ch = substr($haystack,$a,1); $ch2 = substr($haystack,$a+1,1); if (ord($ch) >= HexDec("0x81") && ord($ch2) >= HexDec("0x40") && $skip == 0) { if (substr($haystack,$a,$l2) == $needle) { if ($offset == "r") { $found = true; $value = $w; } elseif ($offset == "a") { $found = true; $value[] = $w; } elseif (!$value) { if ($w >= $atleast) { $found = true; $value = $w; } } } $a += 2; } else { if (substr($haystack,$a,$l2) == $needle) { if ($offset == "r") { $found = true; $value = $w; } elseif ($offset == "a") { $found = true; $value[] = $w; } elseif (!$value) { if ($w >= $atleast) { $found = true; $value = $w; } } } $a++; } $w++; } // END OF WHILE if ($found) { return $value; } else { return $false; }// } // END OF WHILE}function GBrev($text) { $news = ""; $l = strlen($text); $GB = 0; $a = 0; while ($a < $l) { $ch = substr($text,$a,1); $ch2 = substr($text,$a+1,1); if (ord($ch) >= HexDec("0x81") && ord($ch2) >= HexDec("0x40") && $skip == 0) { $a += 2; $news = $ch . $ch2 . $news; } else { $news = $ch . $news; $a++; } } return $news;} function GB_check($text) { $l = strlen($text); $a = 0; while ($a < $l) { $ch = substr($text,$a,1); $ch2 = substr($text,$a+1,1); if (ord($ch) >= HexDec("0x81") && ord($ch2) >= HexDec("0x40")) { return true; } else { return false; } }}function GB_all ($text) { $l = strlen($text); $all = 1; $a = 0; while ($a < $l) { $ch = substr($text,$a,1); $ch2 = substr($text,$a+1,1); if (ord($ch) >= HexDec("0x81") && ord($ch2) >= HexDec("0x40")) { $a += 2; } else { $a++; $all = 0; } } if ($all == 1) { return true; } else { return false; }}function GB_non ($text) { $l = strlen($text); $all = 1; $a = 0; while ($a < $l) { $ch = substr($text,$a,1); $ch2 = substr($text,$a+1,1); if (ord($ch) >= HexDec("0x81") && ord($ch2) >= HexDec("0x40")) { $a += 2; $all = 0; } else { $a++; } } if ($all == 1) { return true; } else { return false; }}function GBcase ($text,$case) { $case = strtolower($case); if ($case != "upper" && $case != "lower" && $case != "ucwords" && $case != "ucfirst") { return "函数用法错误。 $case"; } else { $ucfirst = 0; $ucwords = 0; $news = ""; $l = strlen($text); $GB = 0; $english = 0; $a = 0; while ($a < $l) { $ch = substr($text,$a,1); if ($GB == 0 && ord($ch) >= HexDec("0x81")) { $GB = 1; $english = 0; $news .= $ch; $ucwords = 0; } elseif ($GB == 1 && ord($ch) >= HexDec("0x40") && $english == 0) { $news .= "$ch"; $ucwords = 0; $GB = 0; } else { if ($case == "upper") { $news .= strtoupper($ch); } elseif ($case == "lower") { $news .= strtolower($ch); } elseif ($case == "ucwords") { if ($ucwords == 0) { $news .= strtoupper($ch); } else { $news .= strtolower($ch); } $ucwords = 1; } elseif ($case == "ucfirst") { if ($ucfirst == 0) { $news .= strtoupper($ch); $ucfirst = 1; } else { $news .= strtolower($ch); $ucfirst = 1; } } else { $news .= $ch; } if ($ch == " " || $ch == "\n") { $ucwords = 0; } $english = 1; $GB = 0; } $a++; } // END OF while return $news; } // end else}function GBspace ($text) { $news = ""; $l = strlen($text); $GB = 0; $english = 0; $a = 0; while ($a < $l) { $ch = substr($text,$a,1); $ch2 = substr($text,$a+1,1); if (!($ch == " " && $ch2 == " ")) { if ($GB == 0) { if (ord($ch) >= HexDec("0x81")) { if ($english == 1) { if ((substr($text,$a-1,1) == " ") || (substr($text,$a-1,1) == "\n")) { $news .= "$ch"; } else { $news .= " $ch"; } $english = 0; $GB = 1; } else { $GB = 1; $english = 0; $news .= $ch; } } else { $english = 1; $GB = 0; $news .= $ch; } } else { if (ord($ch) >= HexDec("0x40")) { if ($english == 0) { if ((substr($text,$a+1,1) == " ")|| (substr($text,$a+1,1) == "\n")) { $news .= "$ch"; } else { $news .= "$ch "; } } else { $news .= " $ch"; } } else { $english = 1; $news .= "$ch"; } $GB = 0; } } $a++; } // END OF while // Chk 1 & last is space $l = strlen($news); if (substr($news,0,1) == " ") { $news = substr($news,1); } $l = strlen($news); if (substr($news,$l-1,1) == " ") { $news = substr($news,0,$l-1); } return $news;}function GBunspace($text) { $news = ""; $l = strlen($text); $a = 0; $last_space = 1; while ($a < $l) { $ch = substr($text,$a,1); $ch2 = substr($text,$a+1,1); $ch3 = substr($text,$a+2,1); if (($a + 1) == $l ) { $last_space = 1; } if ($ch == " ") { if ($last_space == 0) { if (ord($ch2) >= HexDec("0x81") && ord($ch3) >= HexDec("0x40")) { if ($chi == 0) { $news .= " "; $last_space = 1; } $chi=1; } elseif ($ch2 != " ") { $news .= " "; $chi = 0; $last_space = 1; } } } else { if (ord($ch) >= HexDec("0x81") && ord($ch2) >= HexDec("0x40")) { $chi = 1; $a++; $news .= $ch . $ch2; $last_space = 0; } else { $chi = 0; $news .= $ch; $last_space = 0; } } $a++; } // Chk 1 & last is space $l = strlen($news); if (substr($news,0,1) == " ") { $news = substr($news,1); } $l = strlen($news); if (substr($news,$l-1,1) == " ") { $news = substr($news,0,$l-1); } return $news;} // END OF Functionfunction GBstrnear($text,$length) {$tex_len = strlen($text);$a = 0;$w = "";while ($a < $tex_len) { $ch = substr($text,$a,1); $ch2 = substr($text,$a+1,1); if (GB_all($ch.$ch2)) { $w .= $ch.$ch2; $a=$a+2; } else { $w .= $ch; $a++; } if ($a == $length || $a == ($length - 1)) { $a = $tex_len; }}return $w;} // END OF FUNCTIONfunction clear_space($text) { $t = ""; for ($a=0;$a<strlen($text);$a++) { $ch = substr($text,$a,1); $ch2 = substr($text,$a+1,1); if ($ch == " " && $ch2 == " ") { } else { $t .= $ch; } } return $t;}?> to网络维他:如果$str的第一位是汉字,ord(substr($str,0,1))>0xa0返回为真.如果$str="china 中华人民共和国";这个字串你该怎么做?用上面我提供的函数substr_for_gb2312($str,$start,$len=null)就行了我只要判断所取的最后一个字符是不是就行了啊?用的着这么麻烦吗?直接判断ord(substr($str,40,1))>0xa0(即我要取40个字符),如果大于0xa0的话,就多取一位,这样不行么? MAC下的xampp mysql的安装路径 请教一下 问个PHP的简单的header函数问题 php笔试题 PHP基础数据库插入问题 session_cahe_limiter问题 做个视频网站! 不知道这些要学到什么时候 PHP的弱点,缺点是什么? 我的spl_auto_register()函数为什么只能注册一个自动加载函数呢? 请教各位大侠!! 怎么样才能不让用户看了我的html代码?
if(ord(substr($str,$i,1))>0xa0) $str=substr($str,0,41)."..";
else $str=substr($str,0,40)."..";
}
这样行不行?
另外,mb_substr()如果和substr差不多的话,那截取的时候,如果遇到汉字,它是少取一位还是多取一位?
if(ord(substr($str,0,1))>0xa0) $str=substr($str,0,41)."..";
else $str=substr($str,0,40)."..";
}
是这样,行否?
如果$str="china 中华人民共和国";这个字串你该怎么做?
用上面我提供的函数substr_for_gb2312($str,$start,$len=null)就行了
$s = mb_substr($text,0,40);
即可
不愿意加载或不能加载可以:
<?
/* 中文处理工具函数 2000-06-06
--- 空格 ---
string GBspace(string) --------- 每个中文字之间加空格
string GBunspace(string) ------- 每个中文字之间的空格清除
string clear_space(string) ------- 用来清除多余的空格--- 转换 ---
string GBcase(string,offset) --- 将字符串内的中英文字转换大小写
offset : "upper" - 字符串全转为大写 (strtoupper)
"lower" - 字符串全转为小写 (strtolower)
"ucwords" - 将字符串每个字第一个字母改大写 (ucwords)
"ucfirst" - 将字符串第一个字母改大写 (ucfirst)
string GBrev(string) ----------- 颠倒字符串--- 文字检查 ---
int GB_check(string) ----------- 检查字符串内是否有 GB 字,有会返回 true,
否则会返回false
int GB_all(string) ------------- 检查字符串内所有字是否有 GB 字,是会返回 true,
否则会返回false
int GB_non(string) ------------- 检查字符串内所有字并不是 GB 字,是会返回 true,
否则会返回false
int GBlen(string) -------------- 返回字符串长度(中文字只计一字母)--- 查找、取代、提取 ---
int/array GBpos(haystack,needle,[offset]) ---- 查找字符串 (strpos)
offset : 留空 - 查找第一个出现的位置
int - 由该位置搜索出现的第一个位置
"r" - 查找最后一次出现的位置 (strrpos)
"a" - 将所有查找到的字储存为数组(返回 array) string GB_replace(needle,str,haystack) -- 查找与取代字符串 (str_replace)
string GB_replace_i(needle,str_f,str_b,haystack) -- 不检查大小写查找与取代字符串
needle - 查找字母
str - 取代字母 ( str_f - 该字母前, str_b 该字母后)
haystack - 字符串 string GBsubstr(string,start,[length]) -- 从string提取出由开始到结尾或长度
length的字符串。
中文字只计一字母,可使用正负数。
string GBstrnear(string,length) -- 从 string提取最接近 length的字符串。
length 中 中文字计2个字母。--- 注意 ---
如使用由 Form 返回的字符串前,请先替字符串经过 stripslashes() 处理,除去多余的 \ 。 用法:在原 PHP 代码内加上:
include ("GB.inc");
即可使用以上工具函数。
*/
$l = strlen($string);
$ptr = 0;
$a = 0;
while ($a < $l) {
$ch = substr($string,$a,1);
$ch2 = substr($string,$a+1,1);
if (ord($ch) >= HexDec("0x81") && ord($ch2) >= HexDec("0x40")) {
$ptr++;
$a += 2;
} else {
$ptr++;
$a++;
} // END IF
} // END WHILE return $ptr;
}function GBsubstr($string,$start,$length) {
if (!is_int($length) && $length != "") {
return "错误:length 值错误(必须为数值)。<br>";
} elseif ($length == "0") {
return "";
} else {
$l = strlen($string);
$a = 0;
$ptr = 0;
$str_list = array();
$str_list2 = array();
while ($a < $l) {
$ch = substr($string,$a,1);
$ch2 = substr($string,$a+1,1);
if (ord($ch) >= HexDec("0x81") && ord($ch2) >= HexDec("0x40")) {
$str_list[$ptr] = $a;
$str_list2[$ptr] = $a+1;
$ptr++;
$a += 2;
} else {
$str_list[$ptr] = $a;
$str_list2[$ptr] = $a;
$ptr++;
$a++;
} // END IF
} // END WHILE if ($start > $ptr || -$start > $ptr) {
return;
} elseif ($length == "") {
if ($start >= 0) { // (text,+)
return substr($string,$str_list[$start]);
} else { // (test,-)
return substr($string,$str_list[$ptr + $start]);
}
} else { if ($length > 0) { // $length > 0
if ($start >= 0) { // (text,+,+)
if (($start + $length) >= count($str_list2)) {
return substr($string,$str_list[$start]);
} else { //(text,+,+)
$end = $str_list2[$start + ($length - 1)] - $str_list[$start] +1;
return substr($string,$str_list[$start],$end);
} } else { // (text ,-,+)
$start = $ptr + $start;
if (($start + $length) >= count($str_list2)) {
return substr($string,$str_list[$start]);
} else {
$end = $str_list2[$start + ($length - 1)] - $str_list[$start] +1;
return substr($string,$str_list[$start],$end);
}
} } else { // $length < 0
$end = strlen($string) - $str_list[$ptr+$length];
if ($start >= 0) { // (text,+,-) {
return substr($string,$str_list[$start],-$end);
} else { //(text,-,-)
$start = $ptr + $start;
return substr($string,$str_list[$start],-$end);
} } // END OF LENGTH > / < 0 }
} // END IF
}function GB_replace($needle,$string,$haystack) {
$l = strlen($haystack);
$l2 = strlen($needle);
$l3 = strlen($string);
$news = "";
$skip = 0;
$a = 0;
while ($a < $l) {
$ch = substr($haystack,$a,1);
$ch2 = substr($haystack,$a+1,1);
if (ord($ch) >= HexDec("0x81") && ord($ch2) >= HexDec("0x40")) {
if (substr($haystack,$a,$l2) == $needle) {
$news .= $string;
$a += $l2;
} else {
$news .= $ch.$ch2;
$a += 2;
}
} else {
if (substr($haystack,$a,$l2) == $needle) {
$news .= $string;
$a += $l2;
} else {
$news .= $ch;
$a++;
}
} // END IF
} // END WHILE
return $news;
}function GB_replace_i($needle,$str_f,$str_b,$haystack) { $l = strlen($haystack);
$l2 = strlen($needle);
$l3 = strlen($string);
$news = "";
$skip = 0;
$a = 0;
while ($a < $l) {
$ch = substr($haystack,$a,1);
$ch2 = substr($haystack,$a+1,1);
if (ord($ch) >= HexDec("0x81") && ord($ch2) >= HexDec("0x40")) {
if (GBcase(substr($haystack,$a,$l2),"lower") == GBcase($needle,"lower")) {
$news .= $str_f . substr($haystack,$a,$l2) . $str_b;
$a += $l2;
} else {
$news .= $ch.$ch2;
$a += 2;
}
} else {
if (GBcase(substr($haystack,$a,$l2),"lower") == GBcase($needle,"lower")) {
$news .= $str_f . substr($haystack,$a,$l2) . $str_b;
$a += $l2;
} else {
$news .= $ch;
$a++;
}
} // END IF
} // END WHILE
return $news;
}function GBpos($haystack,$needle,$offset) {
if (!is_int($offset)) {
$offset = strtolower($offset);
if ($offset != "" && $offset != "r" && $offset != "a") {
return "错误:offset 值错误。<br>";
}
}
$l = strlen($haystack);
$l2 = strlen($needle);
$found = false;
$w = 0; // WORD
$a = 0; // START if ($offset == "" || $offset == "r") {
$atleast = 0;
$value = false;
} elseif ($offset == "a") {
$value = array();
$atleast = 0;
} else {
$value = false;
$atleast = $offset;
}
while ($a < $l) {
$ch = substr($haystack,$a,1);
$ch2 = substr($haystack,$a+1,1);
if (ord($ch) >= HexDec("0x81") && ord($ch2) >= HexDec("0x40") && $skip == 0) {
if (substr($haystack,$a,$l2) == $needle) {
if ($offset == "r") {
$found = true;
$value = $w;
} elseif ($offset == "a") {
$found = true;
$value[] = $w;
} elseif (!$value) {
if ($w >= $atleast) {
$found = true;
$value = $w;
}
}
}
$a += 2;
} else {
if (substr($haystack,$a,$l2) == $needle) {
if ($offset == "r") {
$found = true;
$value = $w;
} elseif ($offset == "a") {
$found = true;
$value[] = $w;
} elseif (!$value) {
if ($w >= $atleast) {
$found = true;
$value = $w;
}
}
}
$a++;
}
$w++;
} // END OF WHILE
if ($found) {
return $value;
} else {
return $false;
}
// } // END OF WHILE}function GBrev($text) {
$news = "";
$l = strlen($text);
$GB = 0;
$a = 0;
while ($a < $l) {
$ch = substr($text,$a,1);
$ch2 = substr($text,$a+1,1);
if (ord($ch) >= HexDec("0x81") && ord($ch2) >= HexDec("0x40") && $skip == 0) {
$a += 2;
$news = $ch . $ch2 . $news;
} else {
$news = $ch . $news;
$a++;
}
}
return $news;
}
$l = strlen($text);
$a = 0;
while ($a < $l) {
$ch = substr($text,$a,1);
$ch2 = substr($text,$a+1,1);
if (ord($ch) >= HexDec("0x81") && ord($ch2) >= HexDec("0x40")) {
return true;
} else {
return false;
}
}
}function GB_all ($text) {
$l = strlen($text);
$all = 1;
$a = 0;
while ($a < $l) {
$ch = substr($text,$a,1);
$ch2 = substr($text,$a+1,1);
if (ord($ch) >= HexDec("0x81") && ord($ch2) >= HexDec("0x40")) {
$a += 2;
} else {
$a++;
$all = 0;
}
}
if ($all == 1) {
return true;
} else {
return false;
}
}function GB_non ($text) {
$l = strlen($text);
$all = 1;
$a = 0;
while ($a < $l) {
$ch = substr($text,$a,1);
$ch2 = substr($text,$a+1,1);
if (ord($ch) >= HexDec("0x81") && ord($ch2) >= HexDec("0x40")) {
$a += 2;
$all = 0;
} else {
$a++;
}
}
if ($all == 1) {
return true;
} else {
return false;
}
}
function GBcase ($text,$case) {
$case = strtolower($case);
if ($case != "upper" && $case != "lower" && $case != "ucwords" && $case != "ucfirst") {
return "函数用法错误。 $case";
} else {
$ucfirst = 0;
$ucwords = 0;
$news = "";
$l = strlen($text);
$GB = 0;
$english = 0; $a = 0;
while ($a < $l) { $ch = substr($text,$a,1);
if ($GB == 0 && ord($ch) >= HexDec("0x81")) { $GB = 1;
$english = 0;
$news .= $ch;
$ucwords = 0;
} elseif ($GB == 1 && ord($ch) >= HexDec("0x40") && $english == 0) {
$news .= "$ch";
$ucwords = 0;
$GB = 0; } else {
if ($case == "upper") {
$news .= strtoupper($ch);
} elseif ($case == "lower") {
$news .= strtolower($ch);
} elseif ($case == "ucwords") {
if ($ucwords == 0) {
$news .= strtoupper($ch);
} else {
$news .= strtolower($ch);
}
$ucwords = 1;
} elseif ($case == "ucfirst") {
if ($ucfirst == 0) {
$news .= strtoupper($ch);
$ucfirst = 1;
} else {
$news .= strtolower($ch);
$ucfirst = 1;
}
} else {
$news .= $ch;
}
if ($ch == " " || $ch == "\n") {
$ucwords = 0;
}
$english = 1;
$GB = 0;
} $a++;
} // END OF while
return $news;
} // end else
}function GBspace ($text) { $news = "";
$l = strlen($text);
$GB = 0;
$english = 0; $a = 0;
while ($a < $l) {
$ch = substr($text,$a,1);
$ch2 = substr($text,$a+1,1);
if (!($ch == " " && $ch2 == " ")) {
if ($GB == 0) {
if (ord($ch) >= HexDec("0x81")) { if ($english == 1) {
if ((substr($text,$a-1,1) == " ") || (substr($text,$a-1,1) == "\n")) {
$news .= "$ch";
} else {
$news .= " $ch";
}
$english = 0;
$GB = 1;
} else {
$GB = 1;
$english = 0;
$news .= $ch;
}
} else {
$english = 1;
$GB = 0;
$news .= $ch;
}
} else {
if (ord($ch) >= HexDec("0x40")) {
if ($english == 0) {
if ((substr($text,$a+1,1) == " ")|| (substr($text,$a+1,1) == "\n")) {
$news .= "$ch";
} else {
$news .= "$ch ";
}
} else {
$news .= " $ch";
}
} else {
$english = 1;
$news .= "$ch";
}
$GB = 0;
}
}
$a++;
} // END OF while // Chk 1 & last is space $l = strlen($news);
if (substr($news,0,1) == " ") {
$news = substr($news,1);
}
$l = strlen($news);
if (substr($news,$l-1,1) == " ") {
$news = substr($news,0,$l-1);
}
return $news;
}function GBunspace($text) {
$news = "";
$l = strlen($text);
$a = 0;
$last_space = 1;
while ($a < $l) {
$ch = substr($text,$a,1);
$ch2 = substr($text,$a+1,1);
$ch3 = substr($text,$a+2,1);
if (($a + 1) == $l ) {
$last_space = 1;
}
if ($ch == " ") {
if ($last_space == 0) {
if (ord($ch2) >= HexDec("0x81") && ord($ch3) >= HexDec("0x40")) {
if ($chi == 0) {
$news .= " ";
$last_space = 1;
}
$chi=1;
} elseif ($ch2 != " ") {
$news .= " ";
$chi = 0;
$last_space = 1;
}
}
} else {
if (ord($ch) >= HexDec("0x81") && ord($ch2) >= HexDec("0x40")) {
$chi = 1;
$a++;
$news .= $ch . $ch2;
$last_space = 0; } else {
$chi = 0;
$news .= $ch;
$last_space = 0;
} }
$a++;
}
// Chk 1 & last is space $l = strlen($news);
if (substr($news,0,1) == " ") {
$news = substr($news,1);
}
$l = strlen($news);
if (substr($news,$l-1,1) == " ") {
$news = substr($news,0,$l-1);
}
return $news;} // END OF Functionfunction GBstrnear($text,$length) {$tex_len = strlen($text);
$a = 0;
$w = "";
while ($a < $tex_len) {
$ch = substr($text,$a,1);
$ch2 = substr($text,$a+1,1);
if (GB_all($ch.$ch2)) {
$w .= $ch.$ch2;
$a=$a+2;
} else {
$w .= $ch;
$a++;
}
if ($a == $length || $a == ($length - 1)) {
$a = $tex_len;
}
}
return $w;
} // END OF FUNCTIONfunction clear_space($text) {
$t = "";
for ($a=0;$a<strlen($text);$a++) {
$ch = substr($text,$a,1);
$ch2 = substr($text,$a+1,1);
if ($ch == " " && $ch2 == " ") {
} else {
$t .= $ch;
}
}
return $t;
}
?>
如果$str="china 中华人民共和国";这个字串你该怎么做?
用上面我提供的函数substr_for_gb2312($str,$start,$len=null)就行了
我只要判断所取的最后一个字符是不是就行了啊?用的着这么麻烦吗?直接判断ord(substr($str,40,1))>0xa0(即我要取40个字符),如果大于0xa0的话,就多取一位,这样不行么?