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preg_split — Split string by a regular expression
    string $pattern,
    string $subject,
    int $limit = -1,
    int $flags = 0
): array|false
Split the given string by a regular expression.


The pattern to search for, as a string.
The input string.
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".
flags can be any combination of the following flags (combined with the | bitwise operator): PREG_SPLIT_NO_EMPTY If this flag is set, only non-empty pieces will be returned by preg_split(). PREG_SPLIT_DELIM_CAPTURE If 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 0 and its string offset into subject at offset 1.

Return Values

Returns an array containing substrings of subject split along boundaries matched by pattern, or false on failure.