How to convert a string to integer in php -

i have variable $var1 = "21,855.00". tried using preg_replace , str_replace not achieve looking for. wish echo 21855. how can using php?

just taking note:

if literal string like:

$var1 = '21,855.00'; // string(9) "21,855.00" 

you can way:

$var1 = '21,855.00'; $var2 = filter_var(strtok($var1, '.'), filter_sanitize_number_int); echo $var2; // 21855 

sample output

or regex:

$var1 = '21,855.00'; $var2 = (int) preg_replace('/(?<=\d),(?=\d{3}\b)/','', $var1); var_dump($var2); // int(21855)