Web Reference: Determine whether a variable is considered to be empty. A variable is considered empty if it does not exist or if its value equals false. empty () does not generate a warning if the variable does not exist. 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: Required. Specifies the variable to check. Sep 24, 2024 · The empty () function in PHP checks whether a variable is empty. It returns true if the variable has a value considered "empty," such as 0, null, false, an empty string, or an unset variable, and false otherwise.
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