PHP is_scalar() Function

PHP is_scalar() Function

The is_scalar() function in PHP finds whether a variable is a scalar or not. It returns a Boolean value TRUE if the parameter var is scalar, else it returns FALSE.

Scalar variables are those containing an integer, float, string or boolean. This function does not consider null to be scalar.

Syntax

is_scalar( mixed $var )

Parameter

var(required)- This parameter represents the value to check.

Return

This function returns a Boolean value TRUE if the parameter var is scalar, else it returns FALSE.

Example 1

Output

500 is a scalar value

Example 2

Output

-5 is a scalar value

Example 3

<?php
 function show_var($var) 
 {
     if (is_scalar($var)) {
         echo "$var is a scalar value\n";
     } else { 
         echo "The array is as follows:\n";
         var_dump($var);
     }
 }
 $val = 1243;
 $city = array("Faridabad", "Noida", "Gurugram"); 
 show_var($val);
 show_var($city)
 ?> 

Output

1243 is a scalar value
 The array is as follows:
 array(3) {
   [0]=>
   string(9) "Faridabad"
   [1]=>
   string(5) "Noida" 
   [2]=>
   string(8) "Gurugram"
 }