is_scalar
(PHP 4 >= 4.0.5, PHP 5, PHP 7, PHP 8)
is_scalar —
Finds whether a variable is a scalar
Description
See scalar types for more information.
Note:
is_scalar() does not consider resource
type values to be scalar as resources are abstract datatypes
which are currently based on integers. This implementation detail should
not be relied upon, as it may change.
Note:
is_scalar() does not consider NULL to be scalar.
Parameters
value-
The variable being evaluated.
Return Values
Returns true if value is a scalar, false
otherwise.
Examples
Example #1 is_scalar() example
<?php
function show_var($var)
{
if (is_scalar($var)) {
echo $var, PHP_EOL;
} else {
var_dump($var);
}
}
$pi = 3.1416;
$proteins = array("hemoglobin", "cytochrome c oxidase", "ferredoxin");
show_var($pi);
show_var($proteins)
?>
The above example will output:
3.1416
array(3) {
[0]=>
string(10) "hemoglobin"
[1]=>
string(20) "cytochrome c oxidase"
[2]=>
string(10) "ferredoxin"
}
See Also
- is_float() - Finds whether the type of a variable is float
- is_int() - Find whether the type of a variable is integer
- is_numeric() - Finds whether a variable is a number or a numeric string
- is_real() - Alias of is_float
- is_string() - Find whether the type of a variable is string
- is_bool() - Finds out whether a variable is a boolean
- is_object() - Finds whether a variable is an object
- is_array() - Finds whether a variable is an array
is_resource
Variable handling Functions