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  • PHP 截取字符串,多余部分用 ........ 代替

    /**
    * 参数说明
    * $string 欲截取的字符串
    * $sublen 截取的长度
    * $start 从第几个字节截取,默认为0
    * $code 字符编码,默认UTF-8
    */


    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, $sublen)) . "....."; return join('', array_slice($t_string[0], $start, $sublen)); } else { $start = $start * 2; $sublen = $sublen * 2; $strlen = strlen($string); $tmpstr = ''; for ($i = 0; $i < $strlen; $i++) { if ($i >= $start && $i < ($start + $sublen)) { if (ord(substr($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) < $strlen) $tmpstr.= ""; return $tmpstr; } }

     使用:

    $str="哈哈,帅哥在此!"; 
    echo cut_str($str, 30, 0, 'gb2312');  // gb2312字符编码
    
    echo cut_str($str,30,0)  //utf-8字符编码
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  • 原文地址:https://www.cnblogs.com/xsphehe/p/5682004.html
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