PHP determines whether it is an integer

PHP method to determine whether a variable is an integer

Method 1:

<?php
  $num=12; //返回right
  //$num=12.1 返回false
  if(is_int($num)){
        echo "right";
  }else{
        echo "false";   
       }
?>

The is_int() method is used here to determine whether the incoming parameter is an integer (int), instead of determining whether it is an integer, which is slightly limited.

Method 2:

<?php
  $num=12;
  if(floor($num)==$num){
        echo "right";
  }else{
        echo "false";   
       }
?>

The floor() method rounds the incoming parameters. Compare the rounded or rounded value with the original value. If they are equal, they are integers; if they are not equal, they are not integers.

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