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<?php
//$str = "abcdef¡ôÖлªÈËÃñ¹²ºÍ¹ú";
//$str = "1234567890";
$str = "ÖлªÈËÃñ¹²ºÍ¹úabcÖлªÈËÃñ¹²ºÍ¹úÖлªÈËÃñ¹²ºÍ¹ú";
$str = cut_str($str, 18);
echo $str;
function cut_str($str, $len){
if(strlen($str) <= $len) return $str;
$n = 0;
$tempstr = '';
for($i = 0; ......