How to Fix \'Trying to Access Array Offset on Value of Type Bool\' Error in PHP 7.4?

Fixing "Trying to Access Array Offset on Value of Type Bool" Error in PHP 7.4

When upgrading to PHP 7.4, some code may encounter the error "Trying to access array offset on value of type bool." This error arises when accessing an array key that corresponds to a boolean value.

One solution to this issue is to use the null coalescing operator (??), introduced in PHP 7.0. The null coalescing operator evaluates the left expression and returns its value if it's not null. Otherwise, it returns the value of the right expression.

In the provided code, the issue occurs in the following line:

if (is_null($Row['Data'])) {
    $session_data = '';
} else {
    $session_data = $Row['Data'];
}

To resolve the error, replace the code with the following:

$session_data = $Row['Data'] ?? '';

Alternatively, you can use the null coalescing assignment operator (??=) to avoid the need for an additional line:

$session_data = $Row['Data'] ??= '';

These modifications ensure that $session_data contains the array value if it exists or a default value (in this case, an empty string) if the array key corresponds to null.

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