How to add up numbers in a php string?

Question

I have a PHP string that contains numbers. Is there a way to add up all the numbers in a string?

For example: I have a string called $soc_count. That string outputs the following:

1 1

Is there a way to add up all the numbers in a string?

My code:

<?php $soc_count = [];$soc_count = (get_row_layout() == 'irl_today_social_media');?>
<?php echo $soc_count;?>

Answer 1

Assuming numbers are positive integers and string is not empty, you can try this:

eval('$sum = ' . trim(preg_replace('/[^0-9]+/', "+0+", $soc_count), '+') . ';');

echo $sum;

Answer 2

Use explode on your string of numbers, and then sum up the array:

$soc_count = "1 1";
$nums = explode(" ", $soc_count);
$total = array_sum($nums);
echo $total;

For a more general solution, which would cover a string of any type having numbers in it, we can try using preg_match_all:

$soc_count = "1 quick brown fox jumped over 1 lazy dog.";
preg_match_all("/\d+/", $soc_count, $matches);
$nums = $matches[0];
$total = array_sum($nums);
echo $total;