Multiple PHP Chinese string interception functions_PHP tutorial

function sysSubStr($string,$length,$append = false)
{
    if(strlen($string) <= $length )
    {
        return $string;
    }
    else
    {
        $i = 0;
        while ($i < $length)
        {
            $stringTMP = substr($string,$i,1);
            if ( ord($stringTMP) >=224 )
            {
                $stringTMP = substr($string,$i,3);
                $i = $i + 3;
            }
            elseif( ord($stringTMP) >=192 )
            {
                $stringTMP = substr($string,$i,2);
                $i = $i + 2;
            }
            else
            {
                $i = $i + 1;
            }
            $stringLast[] = $stringTMP;
        }
        $stringLast = implode("",$stringLast);
        if($append)
        {
            $stringLast .= "...";
        }
        return $stringLast;
    }
}

$string = "简明现代魔法 —— 专注于互联网主流的各种技术";
$length = "27";
$append = true;
echo sysSubStr($string,$length,$append);
// 输出
// 简明现代魔法 —— 专...
?>

//截取中文字符串
function mysubstr($str, $start, $len) {
    $tmpstr = "";
    $strlen = $start + $len;
    for($i = 0; $i < $strlen; $i++) {
        if(ord(substr($str, $i, 1)) > 0xa0) {
            $tmpstr .= substr($str, $i, 2);
            $i++;
        } else
            $tmpstr .= substr($str, $i, 1);
    }
    return $tmpstr;
}
?>

//截取utf8字符串
function utf8Substr($str, $from, $len)
{
    return preg_replace('#^(?:[x00-x7F]|[xC0-xFF][x80-xBF]+){0,'.$from.'}'.
                       '((?:[x00-x7F]|[xC0-xFF][x80-xBF]+){0,'.$len.'}).*#s',
                       '$1',$str);
}
?>

/*
Chinese character interception function supported by Utf-8 and gb2312
cut_str(string, interception length, starting length, encoding);
encoding Default is utf-8
Start length defaults to 0
*/

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($t_string[0]) - $start > $ sublen) return join('', array_slice($t_string[0], $start, $sublen))."..."; $sublen));
}
else
{
$start = $start*2;
$sublen = $sublen*2;
$strlen = strlen($string) ;
$tmpstr = '';

for($i=0; $i< $strlen; $i++)
$tmpstr = ''; if($i>=$start && $i< ; ($start+$sublen))
                                                                                     tmpstr.= substr($string, $i, 2); >                                                                                                                                              (Substr ($ String, $ i, 1)) & gt; 129) $ i ++;
}
IF (Strlen ($ tmpstr) & lt; $ strlen) $ tmpstr. >            return $tmpstr; 🎜>?>






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Copy the code as follows: ?php function sysSubStr($string,$length,$append = false) { if( strlen($string) = $length ) { return $string; } else { $i = 0; while ($i $length) { $string...