Question

How to check if string is a positive integer in PHP

Answer 1

$str = "25";

$n = (int)$str;

echo $n > 0 ? "yes" : "no";




/*
run:

yes

*/

 

70+ SQL courses for beginners and professionals

Answer 2

$str = "25";

$n = (int)$str;

if (is_int($n) && $n > 0 ) {
    echo "yes";
} else {
    echo "no";
}




/*
run:

yes

*/

 

70+ SQL courses for beginners and professionals

Answer 3

$str = "25";

if (ctype_digit($str) && (int)$str > 0 ) {
    echo "yes";
} else {
    echo "no";
}




/*
run:

yes

*/

 

70+ SQL courses for beginners and professionals