strtok
Name
strtok — Fetches tokens from a string.
Synopsis
string strtok([string], delimiter);
string string (optional):
String to tokenize
string delimiter: One or
more token delimiters
Returns
String; FALSE when the end of the string is reached
Description
strtok()() is used to iteratively
parse a string into substrings.
The function should initially be called with both string and delimiter arguments, which does the
following:
-
Sets the string to be used
by the function for subsequent calls.
-
Returns the first token from
the string. The first token is defined as the
substring that extends from the first character in
the string to the first instance of any of the
characters in delimiter
. If none of the characters in delimiter are present in the
string, the entire string is returned.
Subsequent calls to strtok() returns a new
substring that extends from the end of the last substring
returned to the next instance of any of the characters in
delimiter . If none of the
characters in delimiter are
present in the string, the remainder of the string is
returned. If there are no characters left to return, the
function returns FALSE .
The string used in delimiter
can be changed with every call to strtok() .
Example
Example 1234. Break a string
into tokens
<?php
$string = 'This is+a+string+ that uses several delimiters';
echo $token = strtok($string, '+ ');
while (FALSE !== ($token = strtok('+ '))) {
echo "\n", $token;
}
?>
Output:
This
is
a
string
that
uses
several
delimiters
PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing
(Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch).
This material may be distributed only subject to the terms and conditions set forth
in the Open Publication License, v1.0 or later (the latest version is presently available at
http://www.opencontent.org/openpub/).
The authors of this book have elected not to choose any options under the OPL. This online book was obtained
from
http://www.fooassociates.com/phpfer/
and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4
for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All
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