Explode semicolon delimited string and iterate every two values

I have an array with a single value collected from database.

Within a while loop I wish to explode this for every two values.

Example:

$data = array('20;40;60;80;100;150;200;300;500;1000');

I want to explode this value and end up with the following loop:

$lowprice = "20";
$highprice = "40";

You can use preg_match_all().

Example:

$text = '20;40;60;80;100;150;200;300;500;1000';

preg_match_all("/([^;]+);([^;]+)/", $text, $pairs, PREG_SET_ORDER);

foreach ($pairs as $pair) {
    // ...
    $lowvalue = $pair[1];
    $highvalue = $pair[2];
    // ...
}

If you really must use explode and a while loop, the following will also work:

$text = '20;40;60;80;100;150;200;300;500;1000';

$data = explode(';', $text);

$i = 0;
$count = count($data);

while ($i < $count) {
// ...
    $lowvalue = $data[$i++];
    $highvalue = $data[$i++];
// ...
}