What is the is_integer method in PHP?

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.

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