My Dream Chinese Dream Composition PHP supports Chinese string interception functions in multiple encodings!

Support a variety of encoding Chinese string intercept functions!

Copy code code is as follows:

/*
*@todo Chinese interception, support GB2312, GBK, UTF-8, big5
*@param string $str String to be intercepted
* @param int $start 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;
}

The above introduces the Chinese string interception function of My Dream Chinese Dream Composition in PHP that supports multiple encodings!, including the content of My Dream Chinese Dream Composition. I hope it will be helpful to friends who are interested in PHP tutorials.