PHP empty() Function

PHP Variable Handling Reference : Check whether a variable is empty. Also check whether the variable is set/declared

Definition and Usage

The empty() function checks whether a variable is empty or not.

This function returns false if the variable exists and is not empty, otherwise it returns true.

The following values evaluates to empty:

0.0

"0"

NULL

FALSE

array()

empty(variable);

Parameter	Description
variable	Required. Specifies the variable to check

Return Value:	FALSE if variable exists and is not empty, TRUE otherwise
Return Type:	Boolean
PHP Version:	4.0+
PHP Changelog:	PHP 5.5: Support for expressions, not only variables PHP 5.4: Non-numeric offsets of strings returns TRUE

❮ PHP Variable Handling Reference

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