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What is the is_integer method in PHP?

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The is_integer method checks if the type of variable is an integer.

Syntax

is_integer(mixed $value): bool

Parameter

  • value : the variable to evaluate.

Return value

This method returns true if the passed value is an integer type. Otherwise, it returns false.

Code

<?php
$test = 10;
printIsInteger($test);
$test = 10000;
printIsInteger($test);
$test = 100.1;
printIsInteger($test);
$test = '10';
printIsInteger($test);
function printIsInteger($test){
echo "The Value is: ";
var_dump($test);
echo "Is Integer: ";
var_dump(is_integer($test));
echo "---------\n\n";
}
?>

Explanation

In the code above:

  • We have used the is_integer method to check if a variable is an integer.

  • The is_integer method returns true for the value 10 and 10000.

  • The is_integer method returns false for the values 100.1 and 10 because they are float and string types respectively.

RELATED TAGS

php
variable
integer
communitycreator

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

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