PHPsubstr () function

Time truncation (a friend with better suggestions can post it) is optional. Specifies the length of the string to be returned. The default value is until the end of the string.

Syntax

Substr (string, start, length)

Parameters	Description
String	Required. Specifies that a part of the string is to be returned.
Start	Required. Specifies where the string starts. Positive number-start at the specified position of the string Negative number-starting from the specified position at the end of the string 0-start at the first character in the string
Charlist	Optional. Specifies the length of the string to be returned. The default value is until the end of the string. Positive number-return from the position of the start parameter Negative number-return from the end of the string

Instance:

Time truncation (a friend with better suggestions can post it)

 

PHP code

1. $ Str = 20100718-20100718
2. $ Format_time = explode ("-", $ str );
3. $ Time_str. = substr ($ format_time [0], 0, 4 )."-";
4. $ Time_str. = substr ($ format_time [0], 4,2 )."-";
5. $ Time_str. = substr ($ format_time [0], 6, 2 )."~ ";
6. $ Time_str. = substr ($ format_time [1], 0, 4 )."-";
7. $ Time_str. = substr ($ format_time [1], 4,2 )."-";
8. $ Time_str. = substr ($ format_time [1], 6, 2 );
10. Echo $ time_str; // 2010-07-18 ~ 2010-07-18