String function Library: substr

Substr

(PHP3, PHP4)

SUBSTR---&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; Get partial string

Syntax: String substr (string string, int start [, int length])

Description:

SUBSTR () returns a part of a string that is specified by the parameter start and length.

If start is a positive number, the returned string will start with the first character of string.

Example:

<?php

$rest = substr ("abcdef", 1); Returns "Bcdef"

$rest = substr ("abcdef", 1, 3); Returns "BCD"

?>

If start is a negative number, the returned string will start at the end of string.

Example:

<?php

$rest = substr ("abcdef",-1); Returns "F"

$rest = substr ("ABCdef",-2); Returns "EF"

$rest = substr ("ABCdef",-3, 1); Returns "D"

?>

If there is a given parameter length and is a positive number, the returned string returns the length character from start.

If there is a given parameter length and is a negative number, the returned string will end at the length of the string at the end.

Example:

<?php

$rest = substr ("abcdef", 1,-1); Returns "BCDE"

?>

Reference: STRRCHR () Ereg ()