is_numeric

PHP 4, PHP 5, PHP 7, PHP 8
is_numeric - Finds whether a variable is a number or a numeric string
Manual
Code Examples

is_numeric( mixed$value ): bool

Determines if the given variable is a number or a numeric string.

Parameters

value

The variable being evaluated.

Return Values

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

Changelog

Version Description
8.0.0 Numeric strings ending with whitespace ("42 ") will now return true. Previously, false was return instead.

Related Functions

  • ctype_digit - Check for numeric character(s)
  • is_array - Finds whether a variable is an array
  • is_bool - Finds out whether a variable is a boolean
  • is_float - Finds whether the type of a variable is float
  • is_int - Find whether the type of a variable is integer
  • is_null - Finds whether a variable is null
  • is_object - Finds whether a variable is an object
  • is_string - Find whether the type of a variable is string

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