注: preg_split(), which uses a Perl-compatible regular expression syntax, is often a faster alternative to split().
Returns an array of strings, each of which is a
substring of string formed
by splitting it on boundaries formed by the regular
expression pattern. If limit is set, the returned
array will contain a maximum of
limit elements with the last element containing the
whole rest of string. If an
error occurs, split() returns FALSE.
To split off the first four fields from a line from /etc/passwd:
注: If there are n occurrences of pattern, the returned array will contain n+1 items. For example, if there is no occurrence of pattern, an array with only one element will be returned. Of course, this is also true if string is empty.
To parse a date which may be delimited with slashes,
dots, or hyphens:
Note that pattern is
case-sensitive.
Note that if you don't require the power of regular
expressions, it is faster to use
explode(), which doesn't incur the overhead of the
regular expression engine.
For users looking for a way to emulate Perl's @chars = split('', $str) behaviour, please see
the examples for preg_split().
Please note that
pattern is a regular expression. If you want to
split on any of the characters which are considered special
by regular expressions, you'll need to escape them first. If
you think split() (or any other regex
function, for that matter) is doing something weird, please
read the file regex.7, included in
the regex/ subdirectory of the PHP
distribution. It's in manpage format, so you'll want to do
something along the lines of man
/usr/local/src/regex/regex.7 in order to read it.
See also: preg_split(), spliti(),
explode(), implode(),
chunk_split(), and
wordwrap().