An example tutorial on intercepting string functions in PHP Chinese

The content of this section:
PHP Chinese intercept character channeling function

Example:

<?php/*** Chinese string intercept function * by Www.jbxue.com*/function cut_str ($string, $sublen, $filter =true, $start =0, $code = ' UTF-8 ') {if ($filter) $string =html2text ($string); if ($code = = ' UTF-8 ') {$pa = "/[\x01-\x7f]|[ \xc2-\xdf][\x80-\xbf]| [\xe0-\xef] [\X80-\XBF] {2}| [\xf0-\xff] [\X80-\XBF]  {3}/";  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 * *;  $sublen = $sublen;  $strlen =strlen ($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 $tmpstr; }}//html Conversion Functions function Html2text ($str) {$str = Preg_replace ("/<sty (. *) \\/STYLE&GT;|&LT;SCR (. *) \\/SCRIPT&GT;|&Lt;! -(. *)-->/isu "," ", $str); $alltext = ""; $start = 1;  for ($i =0; $i <strlen ($STR), $i + +) {if ($start ==0 && $str [$i]== ">") {$start = 1;    }else if ($start ==1) {if ($str [$i]== "<") {$start = 0;   $alltext. = "";   }else if (Ord ($str [$i]) >31) {$alltext. = $str [$i]; }}} $alltext = Str_replace ("", "", $alltext); $alltext = Preg_replace ("/& ([^;&]*) (;|&)/", "", $alltext);  $alltext = Preg_replace ("/[]+/s", "", $alltext); return $alltext;}