What is the is_int method in PHP?

The is_int method can be used to check if a variable is an integer.

Syntax

is_int(mixed $value): bool

Return value

The is_int method returns true if the passed value is an integer. Otherwise, it returns false.

Code

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

Explanation

In the code above:

  • We use the is_int method to check if the variable is an integer.

  • For the values 10 and 10000, the is_int method returns true.

  • For the values 100.1(float) and '10'(string), the is_int method returns false, as these are not integers.

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