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PHP is_integer() Function

Last Updated : 22 Jul, 2022

The is_integer() function is an inbuilt function in PHP that is used to check whether the type of a variable is an integer or not. This function is an alias of is_int() function.

Syntax:

bool is_integer(mixed $value)

Parameters: This function accepts a single parameter $value that holds the value which needs to check for integer.

Return Value: This function returns true if the value is an integer, and false otherwise.

Example 1:

PHP

<?php 
  
$arr = array(5, 10.5, null, true, "GFG"); 
  
foreach ($arr as $val) { 
    var_dump(is_integer($val)); 
} 
  
?>

Output:

bool(true)
bool(false)
bool(false)
bool(false)
bool(false)

Example 2:

PHP

<?php 
  
$arr = array( 
    15,  
    10 => "Geeks", 
    30.25,  
    "GeeksforGeeks", 
    '',  
    true,  
    50 
); 
  
foreach ($arr as $val) { 
    var_dump(is_integer($val)); 
} 
  
?>

Output:

bool(true)
bool(false)
bool(false)
bool(false)
bool(false)
bool(false)
bool(true)

Reference: https://www.php.net/manual/en/function.is-integer.php

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