PHP is_int() function

By using this function, we can check the input variable is integer or not. This function was introduced in PHP 4.0.

Syntax

Parameters

Parameter	Description	Is compulsory
var_name	The variable being checked.	compulsory

Return type

This function returns true if var_name is an integer, Otherwise false.

Example 1

<?php
	$x=123;
	echo is_int($x);
?>

Output:

Example 2

<?php 
	$x = 56; 
	$y = "xyz"; 
  
	if (is_int($x)) 
	{ 
    	echo "$x is Integer \n" ; 
	} 
	else
	{ 
    	echo "$x is not an Integer \n" ; 
	} 
	if (is_int($y)) 
	{ 
    	echo "$y is Integer \n" ; 
	} 
	else
	{ 
    	echo "$y is not Integer \n" ; 
	} 
?>

Output:

Example 3

<?php 
  
	$check = 12345;
	if( is_int($check )) 
	{
    		echo $check . " is an int!";
	} 
	else 
	{
    		echo $check . " is not an int!";
	}
  
?> 

Output:

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PHP is_int() function

Syntax

Parameters

Return type

Example 1

Example 2

Example 3

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