preg_split -- Split string by a regular expression
array preg_split ( string pattern, string subject [, int limit [, int flags]] )
Returns an array containing substrings of
subject split along boundaries matched by
If limit is specified, then only substrings up to
limit are returned, and if
limit is -1, it actually means "no limit", which is
useful for specifying the flags.
flags can be any combination of the following flags
(combined with bitwise | operator):
If this flag is set, only non-empty pieces will be returned by
If this flag is set, parenthesized expression in the delimiter pattern
will be captured and returned as well. This flag was added for 4.0.5.
If this flag is set, for every occurring match the appendant string
offset will also be returned. Note that this changes the return
value in an array where every element is an array consisting of the
matched string at offset 0 and its string offset
into subject at offset 1.
This flag is available since PHP 4.3.0 .
If you don't need the power of regular expressions, you can choose
faster (albeit simpler) alternatives like explode()
Example 1. preg_split() example : Get the parts of a search string
<?php // split the phrase by any number of commas or space characters, // which include " ", \r, \t, \n and \f $keywords = preg_split("/[\s,]+/", "hypertext language, programming"); ?>
Example 2. Splitting a string into component characters