PHP正则表达式匹配问题

Question

I have this kind of output: 1342&-4&-6 And it could be more times or less: 1342&-4 (I need to replace it with: 1342,1344) 1340&-1&-3&-5&-7 (I need to replace it with: 1340,1341,1343,1345,1347)

I've tried to use preg_match but with no success, Can someone help me with that?

Thanks,

Answer 1

$array = explode('&-', $string);

$len = count($array);

for($i=1; $i<$len; $i++)

    $array[$i] += $array[0]  / 10 * 10;

var_dump(implode(' ', $array));

Answer 2

<?php



//so if you had sting input of "1342&-4" you would get 2 stings returned "1342" and "1344"? 

//1340&-1&-3&-5&-7 --> 1340 and 1341 and 1343 and 1345 and 1347

//$str="1342&-4";
$str="1340&-1&-3&-5&-7";
$x=explode('&-',$str);

//print_r($x);

foreach ($x as $k=> $v){
    if($k==0){
        //echo raw
        echo $v."<br>";
    }else{
    //remove last number add new last number 
    echo substr($x[0], 0, -1).$v."<br>"; 
    }
}

output:

1340
1341
1343
1345
1347

i used <br> you can use what ever you need or add to a new variable(array)