Intercept string Code Summary of Chinese string in PHP

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.
1. Intercept GB2312 Chinese string

Copy the Code code as follows:

< PHP
Intercept Chinese strings
function Mysubstr ($str, $start, $len) {
$tmpstr = "";
$strlen = $start + $len;
for ($i = 0; $i < $strlen; $i + +) {
if (Ord (substr ($str, $i, 1)) > 0xa0) {
$tmpstr. = substr ($str, $i, 2);
$i + +;
} else
$tmpstr. = substr ($str, $i, 1);
}
return $tmpstr;
}
?>

2. Interception of UTF8 encoded multibyte strings

Copy the Code code as follows:

< PHP
Intercept UTF8 string
function Utf8substr ($str, $from, $len)
{
Return Preg_replace (' #^ (?: [\x00-\x7f]|[ \xc0-\xff][\x80-\xbf]+) {0, '. $from. '} '.
' (?: [\x00-\x7f]| [\xc0-\xff] [\x80-\xbf]+) {0, '. $len. '}). * #s ',
' $ ', $str);
}
?>

3. Chinese character interception function supported by UTF-8 and GB2312

Copy the Code code as follows:

< PHP
/*
Chinese character interception function supported by Utf-8 and gb2312
Cut_str (string, intercept length, start length, encode);
encoding defaults to Utf-8
Start length defaults to 0
*/
function Cut_str ($string, $sublen, $start = 0, $code = ' UTF-8 ')
{
if ($code = = ' UTF-8 ')
{
$pa = "/[\x01-\x7f]| [\XC2-\XDF] [\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]| [\xe1-\xef] [\X80-\XBF] [\x80-\xbf]|\xf0[\x90-\xbf][\x80-\xbf][\x80-\xbf]| [\xf1-\xf7] [\X80-\XBF] [\X80-\XBF] [\x80-\xbf]/];
Preg_match_all ($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;
}
}
$str = "ABCD string to intercept";
Echo Cut_str ($STR, 8, 0, ' gb2312 ');
?>

4. Bugfree Character intercept function

Copy the Code code as follows:

< PHP
/**
* @package Bugfree
* @version $Id: functionsmain.inc.php,v 1.32 2005/09/24 11:38:37 wwccss EXP $
*
*
* Return part of a string (Enhance the function substr ())
*
* @author Chunsheng Wang
* @param string $String the string to cut.
* @param int $Length The Length of returned string.
* @param booble $Append whether Append "...": false|true
* @return String The cutted string.
*/
function Syssubstr ($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 = "17test.info in the forefront of China's automated testing";
$Length = "18";
$Append = false;
Echo syssubstr ($String, $Length, $Append);
?>

The above describes the interception of string PHP in the interception of Chinese strings in the code summary, including the interception of string content, I hope that the PHP tutorial interested in a friend to help.

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