What are the potential risks of using the empty() function in PHP when comparing variables?

When using the empty() function in PHP to compare variables, it's important to note that empty() considers variables that are set to 0, an empty string, or null as empty. This can lead to unexpected results if you are not aware of this behavior. To avoid this issue, it's recommended to use strict comparison operators (=== or !==) instead of empty() when comparing variables. 

// Using strict comparison operators to compare variables
if ($var1 === $var2) {
    // Variables are equal
} else {
    // Variables are not equal
}

Keywords

empty function PHP variable comparison data type null values

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