(PHP 4, PHP 5, PHP 7)
preg_split — Split string by a regular expression
$pattern
, string $subject
[, int $limit = -1
[, int $flags = 0
]] ) : arraySplit the given string by a regular expression.
patternThe pattern to search for, as a string.
subjectThe input string.
limit
If specified, then only substrings up to limit
are returned with the rest of the string being placed in the last
substring. A limit of -1 or 0 means "no limit"
and, as is standard across PHP, you can use NULL to skip to the
flags parameter.
flags
flags can be any combination of the following
flags (combined with the | bitwise operator):
PREG_SPLIT_NO_EMPTYPREG_SPLIT_DELIM_CAPTUREPREG_SPLIT_OFFSET_CAPTURE
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.
Returns an array containing substrings of subject
split along boundaries matched by pattern, sau FALSE în cazul eșecului.
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
$keywords = preg_split("/[\s,]+/", "hypertext language, programming");
print_r($keywords);
?>
Exemplul de mai sus va afișa:
Array
(
[0] => hypertext
[1] => language
[2] => programming
)
Example #2 Splitting a string into component characters
<?php
$str = 'string';
$chars = preg_split('//', $str, -1, PREG_SPLIT_NO_EMPTY);
print_r($chars);
?>
Exemplul de mai sus va afișa:
Array
(
[0] => s
[1] => t
[2] => r
[3] => i
[4] => n
[5] => g
)
Example #3 Splitting a string into matches and their offsets
<?php
$str = 'hypertext language programming';
$chars = preg_split('/ /', $str, -1, PREG_SPLIT_OFFSET_CAPTURE);
print_r($chars);
?>
Exemplul de mai sus va afișa:
Array
(
[0] => Array
(
[0] => hypertext
[1] => 0
)
[1] => Array
(
[0] => language
[1] => 10
)
[2] => Array
(
[0] => programming
[1] => 19
)
)
If you don't need the power of regular expressions, you can choose faster (albeit simpler) alternatives like explode() or str_split().
If matching fails, an array with a single element containing the input string will be returned.