PHP is_numeric() Function

PHP Variable Handling Reference : Check whether a variable is a number or a numeric string, or not

Definition and Usage

The is_numeric() function checks whether a variable is a number or a numeric string.

This function returns true (1) if the variable is a number or a numeric string, otherwise it returns false/nothing.

is_numeric(variable);

Parameter	Description
variable	Required. Specifies the variable to check

Return Value:	TRUE if variable is a number or a numeric string, FALSE otherwise
Return Type:	Boolean
PHP Version:	4.0+

❮ PHP Variable Handling Reference

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