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is_null	is_object

	Last updated: Thu, 26 Jun 2008

is_numeric

(PHP 4, PHP 5)

is_numeric — Finds whether a variable is a number or a numeric string

Description

bool is_numeric ( mixed $var )

Finds whether the given variable is numeric. Numeric strings consist of optional sign, any number of digits, optional decimal part and optional exponential part. Thus +0123.45e6 is a valid numeric value. Hexadecimal notation (0xFF) is allowed too but only without sign, decimal and exponential part.

Parameters

var: The variable being evaluated.

Return Values

Returns TRUE if var is a number or a numeric string, FALSE otherwise.

is_numeric

Description

Parameters

Return Values

See Also