Let's see how to validate a float.
Use the filter_Var() built-in function.
And use the constant FILTER_VALIDATE_FLOAT as an argument.
filter_Var(float,FILTER_VALIDATE_FLOAT);
The first argument uses float and the second uses the constant FILTER_VALIDATE_FLOAT.
As shown in the example, you can change the purpose according to the value of a constant.
Returns true if the float is valid and false.
Here is an example of validating a float:
<?php
$int = 1000;
$checkFloat = filter_Var($int, FILTER_VALIDATE_FLOAT);
if($checkFloat == true) {
echo "it is float";
} else {
echo "it is not float";
}
?>
Result
This time let's test it by typing the wrong float.
<?php
$int = "aaa";
$checkFloat = filter_Var($int, FILTER_VALIDATE_FLOAT);
if($checkFloat == true) {
echo "it is float";
} else {
echo "it is not float";
}
?>
이 코드의 결과
