PHP intercepts a certain length of string

function Ssubstr ($string, $length, $dot = ' ... ') {global $charset;   if (strlen ($string) <= $length) {return $string; } $string = Str_replace (Array (' &amp; ', ' &quot; ', ' &lt; ', ' &gt; '), Array (' & ', ' ' ', ' < ', ' > '), $   string);   $strcut = ";    if (Strtolower ($charset) = = ' Utf-8 ') {$n = $tn = $noc = 0;      while ($n < strlen ($string)) {$t = Ord ($string [$n]); if ($t = = 9 | | $t = = 10 | | (<= $t && $t <= 126))      {$tn = 1; $n + +; $noc + +;      } elseif (194 <= $t && $t <= 223) {$tn = 2; $n + = 2; $noc + = 2;      } 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; $noc + = 2;      } elseif ($t = = 252 | | $t = = 253) {$tn = 6; $n + = 6; $noc + = 2;      } else {$n + +;   } if ($noc >= $length) {break;   }} if ($noc > $length) {$n-= $tn;   } $strcut = substr ($string, 0, $n); } else {for ($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. $dot;  Intercept a certain length of string (the function is valid for gb2312 use) <? function Wordscut ($string, $length, $sss =0) {if (strlen ($string) > $length) {if ($sss) {$length = $lengt  h-3; $addstr =@#. @#; } for ($i = 0; $i < $length; $i + +) {if (Ord ($string [$i]) > 127) {$wordscut. = $string [$i]. $string [$i + 1]; /$i + +;     Open source software: phpfensi.com} else {$wordscut. = $string [$i];  }} return $wordscut. $addstr;  } return $string; }?>

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