PHP is_scalar() function

PHP 可用的函数PHP available functions

is_scalar()The function is used to detect whether a variable is a scalar.

Scalar variables are those that contain integer, float, string, or boolean, while array, object, and resource are not scalar.

PHP 4 >= 4.0.5, PHP 5, PHP 7

Syntax

bool is_scalar ( mixed $var )

Parameter description:

  • $var: The variable to be detected.

Return Value

Returns TRUE if the specified variable is scalar, otherwise returns FALSE.

Example

Example

<?php function show_var($var) { if (is_scalar($var)) { echo $var; } else { var_dump($var); } } $pi = 3.1416; $sites = array("Example", "Google", "Facebook"); show_var($pi); echo PHP_EOL; show_var($sites) ?>

Output result:

3.1416
array(3) {
  [0]=>
  string(6) "Example"
  [1]=>
  string(6) "Google"
  [2]=>
  string(8) "Facebook"
}

PHP 可用的函数PHP available functions

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