is_countable

Definition and usage

The is_countable() function is used to check whether the content of a variable is a countable value.

If the variable is countable, the function returns true (1), otherwise false / no content.

Example

Check whether the content of a variable is a countable value:

 <?php
$a = "Hello" ;
echo "a is " . is_countable ( $a ) . "<br>" ;

$b = array ( "red" , "green" , "blue" ) ;
echo "b is " . is_countable ( $b ) . "<br>" ;

$c = array ( "Peter" => "35" , "Ben" => "37" , "Joe" => "43" ) ;
echo "c is " . is_countable ( $c ) . "<br>" ;

$d = [ 1 , 2 , 3 ] ;
echo "d is " . is_countable ( $d ) . "<br>" ;
?>

Try it yourself

Example explanation:

The variable $a contains a string, which is not a countable value, so is_countable($a) will return FALSE . The variables $b , $c and $d contain arrays, which are countable values, so is_countable($b) , is_countable($c) and is_countable($d) will all return TRUE . Arrays are countable, whether they are index arrays or associative arrays.

grammar

 is_countable ( variable ) ;