filter_var()
` function :<?php
$int = "1234";
if (filter_var($int, FILTER_VALIDATE_INT)) {
echo("$int is a valid integer");
} else {
echo("$int is not a valid integer");
}
?>
1234 is a valid integer
$int
` and assign it the value `"1234
"`. We then use the `filter_var()
` function to validate this variable as an integer using the `FILTER_VALIDATE_INT
` filter.