PHP Intercept string

1     /**2 * Method Library-intercept string-"The function author is unknown"3 * @param string $string strings4 * @param int $length character length5 * @param string $dot whether to add after interception ...6 * @param string $charset encoding7 * @return String8      */9      Public functionCUTSTR ($string,$length,$dot= ' ... ',$charset= ' Utf-8 ') {Ten         if(strlen($string) <=$length) { One             return $string; A         } -         $string=Str_replace(Array(' &amp; ', ' &quot; ', ' &lt; ', ' &gt; '),Array(' & ', ' ' "', ' < ', ' > '),$string); -         $strcut= ' '; the         if(Strtolower($charset) = = ' Utf-8 ') { -             $n=$tn=$noc= 0; -              while($n<strlen($string)) { -                 $t=Ord($string[$n]);//ASCII? +                 if($t= = 9 | |$t= = 10 | | (<=$t&&$t<= 126)) { -                     $tn= 1;$n++;$noc++; +}ElseIf(194 <=$t&&$t<= 223) { A                     $tn= 2;$n+ = 2;$noc+ = 2; at}ElseIf(224 <=$t&&$t< 239) { -                     $tn= 3;$n+ = 3;$noc+ = 2; -}ElseIf(<=$t&&$t<= 247) { -                     $tn= 4;$n+ = 4;$noc+ = 2; -}ElseIf(248 <=$t&&$t<= 251) { -                     $tn= 5;$n+ = 5;$noc+ = 2; in}ElseIf($t= = 252 | |$t= = 253) { -                     $tn= 6;$n+ = 6;$noc+ = 2; to}Else { +                     $n++; -                 } the                 if($noc>=$length) { *                      Break; $                 }Panax Notoginseng             } -             if($noc>$length) { the                 $n-=$tn; +             } A             $strcut=substr($string, 0,$n); the}Else { +              for($i= 0;$i<$length;$i++) { -                 $strcut.=Ord($string[$i]) > 127?$string[$i].$string[++$i] :$string[$i]; $             } $         } -         $strcut=Str_replace(Array(' & ', ' ' "', ' < ', ' > '),Array(' &amp; ', ' &quot; ', ' &lt; ', ' &gt; '),$strcut); -         return $strcut.$dot; the}

PHP Intercept string