php中文支援函數 php中文截取字串函數 PHP中文字串翻轉

/**
 * 將一個字串中含有全角的數字字元、字母、空格或'%+-()'字元轉換為對應半角字元
 *
 * @access public
 * @param string $str 待轉換字串
 *
 * @return string $str 處理後字串
*/
function make_semiangle($str)
{
 $arr = 隊列( '0' => '0', '１' => '1', '２' => '2', '３' => '3', '４' => '4' ,
 '5 ' => '6', '7' => '8', '9' => '9',
 'A' => 'A', 'B' => 'B', 'C' = > > 'D', 'E' => 'E',
 'F', 'G' => 'H', 'I' => 'J' => 'K', 'L' => ' M', 'N' => 'N', 'O' => 'O',
 'P', 'Q' => 'Q', 'R' => > 'S', 'T ' => 'U' => 'V', 'W' => X' => 'X', 'Ｙ' => 'Y',
 'Z' => 'a', 'b ' =>; ', 'c' => 'c', 'd' => 'd',
 'e' => 'e', 'f' =>; > 'i',
 'j', 'k' =>; ' => 'l', 'm' => 'n',
 'o', 'p' =>, 'ｑ ' => 'q', 'r ' => 'r', 's' => 's',
 't' =>; 't', 'u' => 'u', 'v' => 'v', 'w' => 'w', 'x' => 'x',
 'y' =>; 'y', 'ｚ' => 'z',
 ' （' =>; '(', ')' => ')', '〔' => '[', ']' => ']', '【' => '[',
 '】 ' => ']', '〖 ' => '[', '〗' => ']', '“' => '[', '”' => ']',
 ''' = > '[', ''' = > ']', '｛' => '{', '｝' =>; '}', '《' => ' '》' => '>',
 '％ ' =>; '+' => '+', '—' => '-', '－' => '-', '～' => ' -',
 '：' =>; ' :', '。 , '？ ', ''' => '`', ''' => '`', '｜' => '|', '〃' => '"' ,
 '' => ' ','＄ '=>'$','＠'=>'@','＃'=>'#','＾'=>'^','＆' =>'&','＊'=>'* ');

 return strtr($str, $arr);
}


複製程式碼

cut_str(, 截取長度字串、開始長度、編碼）；
編碼為預設utf-8
開始長度預設為0
* edit: bbs.it-home.org
*/
function cut_str($string , $sublen, $start = 0, $code = 'UTF-8') {
 if ($code == 'UTF-8') {
 $pa = "/[x01-x7f]|[ xc2-xdf][x80-xbf]|xe0[xa0-xbf][x80-xbf]|[xe1-xef][x80-xbf][x80-xbf]|xf0[x90-xbf][x80-xbf][ x80-xbf]|[xf1 -xf7][x80-xbf][x80-xbf][x80-xbf]/";
 preg_match_all ( $pa, $string, $t_string );
 if (count (count (count. $t_string [0] ) - $start > $sublen)
 return join ( '', array_slice ( $t_string [0], $start, $sublen ) ) 。 「…」；
 return join ( ' ', array_slice ( $t_string [0], $start, $sublen ) );
 } else {
 $start = $start * 2;
 $sublen = $sublen *
 $; strlen = strlen ( $string );
 $tmpstr = ''
 for($i = 0; $i  if ($i >= $start && $ i  if (ord ( substr ( $string, $i, 1 ) ) > 129) {
 $tmpstr .= substr ( $string, $i, 2 ) ;
 } else {
 $tmpstr .= substr ( $string, $i, 1 );
 }
 }
 if (ord ( substr ( $string, $i, 1 ) ) > 129)
 $i ++;
 }
 if (strlen ( $tmpstr )  $tmpstr .= "...";
 回傳 $tmpstr;
 }
}
$str = "abcd 需要截取的字串";
echo cut_str ( $str, 1, 0, 'gb2312' );
？例3，字符串的载取
 

/**
 * 字符截取 支持UTF8/GBK
 * @param $string
 * @param $length
 * @param $dot
 */
function str_cut($string, $length, $charset = 'utf-8', $dot = '...') {
    $strlen = strlen($string);
    if($strlen <= $length) return $string;
    $string = str_replace(array(' ',' ', '&', '"', ''', '“', '”', '—', '<', '>', '·', '…'), array('∵',' ', '&', '"', "'", '“', '”', '—', '<', '>', '·', '…'), $string);
    $strcut = '';
    if(strtolower($charset) == 'utf-8') {
        $length = intval($length-strlen($dot)-$length/3);
        $n = $tn = $noc = 0;
        while($n < strlen($string)) {
            $t = ord($string[$n]);
            if($t == 9 || $t == 10 || (32 <= $t && $t <= 126)) {
                $tn = 1; $n++; $noc++;
            } elseif(194 <= $t && $t <= 223) {
                $tn = 2; $n += 2; $noc += 2;
            } elseif(224 <= $t && $t <= 239) {
                $tn = 3; $n += 3; $noc += 2;
            } elseif(240 <= $t && $t <= 247) {
                $tn = 4; $n += 4; $noc += 2;
            } elseif(248 <= $t && $t <= 251) {
                $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);
        $strcut = str_replace(array('∵', '&', '"', "'", '“', '”', '—', '<', '>', '·', '…'), array(' ', '&', '"', ''', '“', '”', '—', '<', '>', '·', '…'), $strcut);
    } else {
        $dotlen = strlen($dot);
        $maxi = $length - $dotlen - 1;
        $current_str = '';
        $search_arr = array('&',' ', '"', "'", '“', '”', '—', '<', '>', '·', '…','∵');
        $replace_arr = array('&',' ', '"', ''', '“', '”', '—', '<', '>', '·', '…',' ');
        $search_flip = array_flip($search_arr);
        for ($i = 0; $i < $maxi; $i++) {
            $current_str = ord($string[$i]) > 127 ? $string[$i].$string[++$i] : $string[$i];
            if (in_array($current_str, $search_arr)) {
                $key = $search_flip[$current_str];
                $current_str = str_replace($search_arr[$key], $replace_arr[$key], $current_str);
            }
            $strcut .= $current_str;
        }
    }
    return $strcut.$dot;
}
例4，PHP中文字符串翻转
翻转一个字符串可以使用strrev()函数即可。
但有时需要处理是字符串是含中文的，这样用strrev就会出现乱码。
这里自定义一个函数来处理含中文的字符。
 


/**
* 中文字符串翻转
* by bbs.it-home.org
*/
function cstrrev($str)
{
    $len = strlen($str);
    for($i = 0; $i < $len; $i++)
    {
        $char = $str{0};
        if(ord($char) > 127)
        {
            $i++;
            if($i < $len)
            {
                $arr[] = substr($str, 0, 2);
                $str = substr($str, 2);
            }
        }
        else
        {
            $arr[] = $char;
            $str = substr($str, 1);
        }
    }
    return join(array_reverse($arr));
}
#使用方法：
$str = '中文.look!';
echo cstrrev($str);
#结果输出：!kool.文中


附5，
 


function str_replace_cn($needle, $str, $haystack, $charset = "utf-8"){
 $ re['utf-8'] = "/[x01-x7f]|[xc2-xdf][x80-xbf]|[xe0-xef][x80-xbf]{2}|[xf0-xff][x80 - xbf]{3}/";
 $re['gb2312'] = "/[x01-x7f]|[xb0-xf7][xa0-xfe]/";
 $re['gbk'] = "/[x01-x7f]|[x81-xfe][x40-xfe]/";
 $re['big5'] = "/[x01-x7f]|[x81-xfe]([x40-x7e]|xa1-xfe])/";

 preg_match_all($re[$charset], $haystack, $match_haystack);
 preg_match_all($re[$charset], $needle, $match_needle);

 for($i = 0; $i  if(!in_array($match_needle[0][$i], $match_haystack[ 0 ]))return $haystack;//無符合
 }

 $match_haystack = $match_haystack[0];
 $match_needle = $match_needle[0];

 for($i = 0; $i  if($match_haystack[$i] == "")繼續;
 if($match_haystack[$i] == $match_needle[0]){
 if(count($match_needle) == 1){//若只有一個字元
 $match_haystack[$i] = $str;
 }else{
 $flag = true;
 for($j = 1; $j  if($match_haystack[$i + $j] != $match_needle[$j]){
 $flag = false;
 休息;
 }
 }
 if($flag){//符合
 $match_haystack[$i] = $str;
 for($j = 1; $j  $match_haystack[$i + $j] = "";
 }
 }
 }
 }
 }
 return implode("", $match_haystack);
 }