Use of strings

Use of strings

This post is reprinted from: http://blog.9cbs.net/shenzhe__/archive/2004/07/31/57102.aspx

First, the use of strings

1. I want to access or change part of the string instead of the entire string

Substr () and substr_replace () functions. A part of the readable writing string.

$ SUB_STR = Substr ($ STR, $ Initial_pos);

$ SUB_STR = Substr ($ STR, $ INITIAL_POS, $ STR_LEN);

$ new_str = substr_replace ($ STR, $ Replacement, $ Initial_POS);

$ new_str = Substr_replace ($ STR, $ Replacement, $ INITIAL_POS, $ STR_LEN);

? >

The strpos () function can give the specified character in the first place in the string:

$ Email = 'shenzhe163@sohu.com';

$ usrname = sub ($ Email, 0, Strop ($ Email, '@'));

?>

Substr () and EREG () functions can match part of the string

IF (EREG ("YouPattern", Substr ($ String, -15))) {

Print "The Last 15 Characters of String Match The Pattern";

}

?>

The unpack () function extracts binary data from the string and put it into a related array.

// read Five Characters and assign to $ REC ["zipcode"];

$ REC = Unpack ("A5zcode", $ STR);

// Same Thing Whit Substring

$ REC ["Xipcode"] = SUBSTR ($ STR, 0, 5);

?>