how to convert php variable string to int -

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how convert string variable integer

2, 990.00

i want output this

2990.00

if add 2 numbers 

$num1 = '2, 990.00'; <br> $num2 = '7, 990.00'; <br>  <br><br>  $ans = $num1 + $num2;<br>  echo $ans;

answers 9

you can use preg_replace("/[^0-9.]/", "", $subject) eliminate non-numeric characters.


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