如何在PHP中将数字与数字分开

Question

I have string as following:

$str = "Q1-Q4,A3-A6,S9-S11";

Can someone tell me how to split the above text in PHP so that I get following as output:

Q1,Q2,Q3,Q4,A3,A4,A5,A6,S9,S10,S11

Answer 1

This should get you going. This separates the sequences, adds in extra items and returns all of this as an array you can conveniently use.

$str = "Q1-Q4,A3-A6,S9-S11";

$ranges = explode (',', $str);
$output = [];

foreach ($ranges as $range) {

    $items = explode ('-', $range );
    $arr = [];
    $fillin = [];

    $letter = preg_replace('/[^A-Z]/', '', $items[0]);
    $first  = preg_replace('/[^0-9]/', '', $items[0]);
    $last   = preg_replace('/[^0-9]/', '', end($items));


    for($i = $first; $i-1 < $last; $i++) {
        $fillin[] = $letter . $i;
    }

    $output[]  = $fillin;

}

var_dump( $output );
exit;