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 …

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.

In this tutorial, you'll learn how to use the PHP empty () construct to check if a variable is empty.

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 …

Apr 16, 2025 · PHP empty keyword tutorial shows how to check for empty values in PHP. Learn empty () with practical examples.

Dec 27, 2023 · Thankfully, PHP includes a very useful built-in function – empty () – specifically designed for this purpose. By using empty (), you can easily test if a variable contains a value …

We then use the empty() function to check whether each variable is empty. The output shows that $var1, $var3, $var4, $var5, and $var6 are all empty (true), while $var2 is not empty (false). …

Jul 17, 2025 · 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 …

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 …

Jul 23, 2025 · An empty variable can refer to a variable that has not been set, a variable that has been explicitly set to an empty value, or a variable that contains a value that is considered …