Collect several PHP string intercept functions that support Chinese _php tutorial

String interception is a very common programming task, and often a string interception with Chinese is often used. Although not difficult, but write their own function implementation and time-consuming, here is a more useful string interception function, capable of the basic requirements.

!--? phpfunction syssubstr ($string, $length, $append = False) {if (strlen ($string) <= $length)     {return $string;         } else {$i = 0; while ($i             $length) {$stringTMP = substr ($string, $i, 1); if (Ord ($stringTMP)-->=224)                 {$stringTMP = substr ($string, $i, 3);             $i = $i + 3;                 } elseif (Ord ($stringTMP) >=192) {$stringTMP = substr ($string, $i, 2);             $i = $i + 2;             } else {$i = $i + 1;         } $stringLast [] = $stringTMP;         } $stringLast = Implode ("", $stringLast);         if ($append) {$stringLast. = "...";     } return $stringLast; }} $string = "Help the home-focus on the Internet in the mainstream of a variety of technologies"; $length = "27"; $append = true; Echo syssubstr ($string, $length, $append); Output//Help the home--...? 

Intercept GB2312 Chinese string:

 
  0xa0) {            $tmpstr. = substr ($str, $i, 2);            $i + +;        } else            $tmpstr. = substr ($str, $i, 1);    }    return $tmpstr;}? >

To intercept UTF8 encoded multibyte strings:

UTF-8, GB2312 are supported by the Chinese character interception function:

 $sublen) return join ("', Array_slice ($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; }} $str = "ABCD needs to intercept the string"; Echo Cut_str ($STR, 8, 0, ' gb2312 ');?>

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