Chinese string interception function that supports multiple encodings in php!_PHP tutorial

Chinese string interception function that supports various encodings! todo Chinese interception, supports gb2312, gbk, utf-8, big5
*

* @param string $str The string to be intercepted * @param int $start The interception starting position * @ param int $length interception length * @param string $charset utf-8|gb2312|gbk|big5 encoding * @param $suffix whether to add a suffix

*/

function csubstr ($str, $start=0, $length, $charset="utf-8", $suffix=true)
{
if(function_exists("mb_substr"))
return mb_substr($str , $start, $length, $charset);
$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], $str, $match);
$slice = join("",array_slice($match[0], $start, $length));
if($suffix) return $slice."…";
return $slice;
}





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Chinese string interception function that supports multiple encodings! Copy the code as follows: /* *@todo Chinese interception, Support gb2312, gbk, utf-8, big5 * *@paramstring$str The string to be intercepted *@paramint$sta...