By using this function, we can check the input variable is integer or not. This function was introduced in PHP 4.0.
bool is_int (mixed $var)
| Parameter | Description | Is compulsory |
|---|---|---|
| var_name | The variable being checked. | compulsory |
This function returns true if var_name is an integer, Otherwise false.
<?php $x=123; echo is_int($x); ?>
Output:
<?php
$x = 56;
$y = "xyz";
if (is_int($x))
{
echo "$x is Integer \n" ;
}
else
{
echo "$x is not an Integer \n" ;
}
if (is_int($y))
{
echo "$y is Integer \n" ;
}
else
{
echo "$y is not Integer \n" ;
}
?>Output:
<?php
$check = 12345;
if( is_int($check ))
{
echo $check . " is an int!";
}
else
{
echo $check . " is not an int!";
}
?>Output:
