is_int() es una función incorporada en PHP. La función is_int() se usa para probar si el tipo de la variable especificada es un número entero o no.
Sintaxis :
boolean is_int($variable_name) Parameter: this function contains a single parameter $variable_name: the variable we want to check. Return value : it is a boolean function so returns T RUE when $variable_name is an integer, otherwise FALSE.
<?php
$variable_name1 = 56;
$variable_name2 = "xyz";
if (is_int($variable_name1))
{
echo "$variable_name1 is Integer \n" ;
}
else
{
echo "$variable_name1 is not an Integer \n" ;
}
if (is_int($variable_name2))
{
echo "$variable_name2 is Integer \n" ;
}
else
{
echo "$variable_name2 is not Integer \n" ;
}
?>
Salida :
56 is Integer xyz is not Integer
Referencia : http://php.net/manual/en/function.is-int.php