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preg_split

preg_split

Split string by a regular expression

 **preg_split** string $pattern string $subject int $limit int $flags

Split 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 are returned with the rest of the string being placed in the last substring. A of -1 or 0 means "no limit". limit``limit

flags can be any combination of the following flags (combined with the bitwise operator):

  `flags``|``PREG_SPLIT_NO_EMPTY`
      If this flag is set, only non-empty pieces will be returned by
      .
      `preg_split`

PREG_SPLIT_DELIM_CAPTUREIf this flag is set, parenthesized expression in the delimiter pattern will be captured and returned as well.

PREG_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 and its string offset into at offset . 0``subject``1

Returns an array containing substrings of split along boundaries matched by , return.falseforfailure. subject``pattern

Voorbeeld: 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);
?>

Array
(
    [0] => hypertext
    [1] => language
    [2] => programming
)

Voorbeeld: Splitting a string into component characters

<?php
$str = 'string';
$chars = preg_split('//', $str, -1, PREG_SPLIT_NO_EMPTY);
print_r($chars);
?>

Array
(
    [0] => s
    [1] => t
    [2] => r
    [3] => i
    [4] => n
    [5] => g
)

Voorbeeld: 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);
?>

Array
(
    [0] => Array
        (
            [0] => hypertext
            [1] => 0
        )

    [1] => Array
        (
            [0] => language
            [1] => 10
        )

    [2] => Array
        (
            [0] => programming
            [1] => 19
        )

)

Tip: > If you don't need the power of regular expressions, you can choose faster (albeit simpler) alternatives like or . explode``str_split

Tip: > If matching fails, an array with a single element containing the input string will be returned.

PCRE Patternspreg_quote``explode``preg_match``preg_match_all``preg_replace``preg_last_error

Vorige ← preg_replace

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