php - preg_match to match substring of three numbers consecutively?

Question

I have a string $text_arr="101104105106109111112113114116117120122123124" fairly big string

If i want to split three numbers from them like 101,104,105 and store them in $array .What should i do?

I tried doing this:

preg_match_all('/[0-9]{3}$/',"$text_arr",$array); 

Answer 1

The easiest way to do this is with preg_split()^Docs:

$result = preg_split('/(d{3})/', $str, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);

See it working, or the result:

Array
(
    [0] => 101
    [1] => 104
    [2] => 105
    [3] => 106
    [4] => 109
    [5] => 111
    [6] => 112
    [7] => 113
    [8] => 114
    [9] => 116
    [10] => 117
    [11] => 120
    [12] => 122
    [13] => 123
    [14] => 124
)