string and integer sum calculate in php?

Solution:

Try operator intval for extract int from string. But work only if int in the start of string.

    $a = intval('32abc');
    $b = 1;
    echo $a + $b;

Solution:

Try preg_replace to allow only numbers, so like this:

<?php

$a = '32abc'; 
$b = 'abc1';
$c = '1abc1';
$d = 6;

echo preg_replace('/[^0-9.]+/', '',   $a) + preg_replace('/[^0-9.]+/', '',   $b) + preg_replace('/[^0-9.]+/', '',   $c) + $d;

?>

will echo 50 (32 + 1 + 11 + 6)

You could also make a function and do it like:

echo removeCharsFromString($a) + removeCharsFromString($b) + removeCharsFromString($c) + $d;

function removeCharsFromString(string $inputString) {
    return (int) preg_replace('/[^0-9.]+/', '',   $inputString);
}