is_scalar-Check if the variable is a scalar (PHP 4 >= 4.0.5, PHP 5, PHP 7)

bool is_scalar ( mixed $var )

If the given variable parameter var is a scalar,is_scalar () returns TRUE , otherwise returns FALSE .

Scalar variables are variables that contain an integer,float,string, or Boolean, while array, object,and resource are not scalars.

<?php
functionShow_var($var) {
if (Is_scalar($var)) {
Echo$var;
} else {
Var_dump($var);
}
}
$pi=3.1416;
$proteins= Array ("Hemoglobin","Cytochrome c oxidase", ) ;

show_var $pi );
//  print: 3.1416

show_var ( $proteins )
//   Print:
// array (3)  {
//   [0]=>
//   string   " Hemoglobin "
//   [1]=>
//   string  " cytochrome c  Oxidase "
//   [2]=>
//   string  " ferredoxin "
// }
Span style= "color: #0000bb;" >?>

Note:

Although the current resource types are in integers, is_scalar () does not treat them as scalars, because resources are abstract data types. The execution details cannot be relied upon, as it may change.

See Is_bool (),is_numeric (),is_float (),is_int (),is_real (),is_string (),is_object (), Is_array () and Is_integer ().

is_scalar-Check if the variable is a scalar (PHP 4 >= 4.0.5, PHP 5, PHP 7)