is_scalar
(PHP 4 >= 4.0.5, PHP 5, PHP 7)
is_scalar — Finds whether a variable is a scalar
Description
bool is_scalar ( mixed $var )Finds whether the given variable is a scalar.
Scalar variables are those containing an integer, float, string or boolean. Types array, object and resource are not scalar.
Note: is_scalar() does not consider resource type values to be scalar as resources are abstract datatypes which are currently based on integers. This implementation detail should not be relied upon, as it may change.
Note: is_scalar() does not consider NULL to be scalar.
Parameters
var
The variable being evaluated.
Return Values
Returns TRUE if var is a scalar, FALSE otherwise.
Examples
Example #1 is_scalar() example
<?php
function?show_var($var)?
{
????if?(is_scalar($var))?{
????????echo?$var;
????}?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
is_string →
? 1997–2017 The PHP Documentation GroupLicensed under the Creative Commons Attribution License v3.0 or later.
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