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Asked: 2026-06-09T08:29:24+00:00

Really poor at regular expressions, sorry in advance! I’ve tried my best to work

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Really poor at regular expressions, sorry in advance!

I’ve tried my best to work out how to split a string into a array with two delimiters and still capture one and include it in the final array. preg_split seems ideal for this but my regular expression is letting me down.

If for example, I’ve the string foo = bar AND bar=foo; I want to split the string at either a space, or the = character BUT keep the = so the array would look like:

Array
(
    [0] => foo
    [1] => =
    [2] => bar
    [3] => AND
    [4] => bar
    [5] => =
    [6] => foo
)

Unfortunately, I’m getting this:

Array
(
    [0] => foo
    [1] => 
    [2] => =
    [3] => 
    [4] => bar
    [5] => AND
    [6] => bar
    [7] => =
    [8] => foo
)

I’ve got here with this code (in PHP):

<!doctype html>
<?php

$string = 'foo = bar AND bar=foo';

$array = preg_split('/ +|(=)/', $string, -1, PREG_SPLIT_DELIM_CAPTURE);

?>
<pre>
<?php

print_r($array);

?>
</pre>

I’d really appreciate any help you guys can give, thanks everyone!

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1 Answer

  1. Editorial Team

    Add the PREG_SPLIT_NO_EMPTY flag:

    $string = 'foo = bar AND bar=foo';
$array = preg_split('/ +|(=)/', $string, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);

    Now, this outputs:

    Array
(
    [0] => foo
    [1] => =
    [2] => bar
    [3] => AND
    [4] => bar
    [5] => =
    [6] => foo
)
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