is_numeric

Function • Params and return types changed in PHP 8.0

Finds whether a variable is a number or a numeric string.

PHP 5

PHP 7

Improved

PHP 8.1

PHP 8.2

PHP 8.3

PHP 8.4

PHP 8.5

`is_numeric` Function synopsis

is_numeric(mixed $value): bool

Parameters

`$value`

Typemixed

The variable being evaluated.

Return value

Typebool

Returns true if $value is a number or a numeric string, false otherwise.

Changes to the `is_numeric` Function

PHP 8.0

Return type added: bool
Parameter type added for parameter #1 ($value): mixed

- is_numeric($value)
+ is_numeric(mixed $value): bool

`is_numeric` Function Availability

PHP Version	Availability
PHP 8.5Future Release	Yes
PHP 8.4Upcoming Release	Yes
PHP 8.3Supported (Latest)	Yes
PHP 8.2Supported	Yes
PHP 8.1Security-Fixes Only	Yes
PHP 8.0Unsupported	Yes
PHP 7.4Unsupported	Yes
PHP 7.3Unsupported	Yes
PHP 7.2Unsupported	Yes
PHP 7.1Unsupported	Yes
PHP 7.0Unsupported	Yes
PHP 5.6Unsupported	Yes
PHP 5.5Unsupported	Yes
PHP 5.4Unsupported	Yes
PHP 5.3Unsupported	Yes