We can use built-in functions to intercept strings in php, but built-in functions do not support intercept Chinese characters. If you need to intercept Chinese strings, we need to perform some operations. I will introduce them to you. We can use built-in functions to intercept strings in php, but built-in functions do not support intercept Chinese characters. If you need to intercept Chinese strings, we need to perform some operations. I will introduce them to you.
Script ec (2); script
Code for GB2312
| The Code is as follows: |
|
// $ Str is the string to be intercepted
// $ Start is the starting position of the characters to be captured
// $ Len refers to the length of characters to be intercepted
Function sub_str ($ 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 ."...";
} |
For uft8
| The Code is as follows: |
|
// Truncate the 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 ',
'$ 1', $ str );
}
?> |
The above method is definitely not practical, because I hope to automatically identify any encoded string interceptions, and then I will share it with my friends.
| The Code is as follows: |
|
<? Php
/**
* @ Package BugFree
* @ Version $ Id: FunctionsMain. inc. php, v 1.32 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 = "www.111cn.net is at the forefront of China's automated testing ";
$ Length = "18 ";
$ Append = false;
Echo sysSubStr ($ String, $ Length, $ Append );
?> |
