Are there any built-in functions in PHP that can be used to check if a variable falls within a specific range?

To check if a variable falls within a specific range in PHP, you can use the `filter_var()` function with the `FILTER_VALIDATE_INT` filter option. This function will validate if the variable is an integer and within the specified range. 

$number = 15;
$min = 10;
$max = 20;

if (filter_var($number, FILTER_VALIDATE_INT, array("options" => array("min_range"=>$min, "max_range"=>$max))) !== false) {
    echo "The number is within the range.";
} else {
    echo "The number is not within the range.";
}

Keywords

PHP built-in functions variable range check

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