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   $arr = array(     15,     10 => "Geeks",     30.25,     "neveropen",     '',     true,     50 );   foreach ($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
