Let's learn how to validate integers.
Use the filter_Var() built-in function.
And use the constant FILTER_VALIDATE_INT as argument.
filter_Var(integer,FILTER_VALIDATE_INT);
The first argument is an integer and the second uses the constant FILTER_VALIDATE_INT.
As shown in the example, you can change the purpose according to the value of a constant.
Returns true if the integer is valid and false.
The following example validates an integer.
<?php
$int = 1000;
$checkInt = filter_Var($int, FILTER_VALIDATE_INT);
if($checkInt == true) {
echo "This is Integer";
} else {
echo "This is not Integer";
}
?>
Result
This time, let's test it by entering the wrong integer.
<?php
$int = 1000.1;
$checkInt = filter_Var($int, FILTER_VALIDATE_INT);
if($checkInt == true) {
echo "This is Integer";
} else {
echo "This is not Integer";
}
?>
Result
