Solve Trying to access array offset on value of type null error.

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When user try to fetch the details from database and if the fetched value is null, then user will get this error.

These errors are seen by user because database is returning null values, it can be either null array or null column value from database.

These type of errors seen when we try to upgrade our server PHP version to 7.4 or greater.

To fix this error, you need to make sure that the value you are trying to access is not null. This might involve initializing the array or checking that the value is not null before trying to access it.

Use isset() function to solve the error.

The isset function in PHP is used to determine whether a variable is set or not. A variable is considered as a set variable if it has a value other than NULL.It means that if a variable, array, or array key is not set or it has a NULL value, the isset function will return false, otherwise, you will get true as the return value. You can pass multiple arguments in the isset function and it will check for all the passed parameters whether or not they are set. In this case, the isset function will return true only if all the passed arguments are set. If any of the arguments have a NULL value, the isset function will return false

Error Code:

In above code, $value['starttime'] is fetched from database and displayed in value of input, it will throw an error if $value['starttime'] is null.

Solution:

Before printing $value['starttime'], we need to make sure that if $value['starttime'] is set and not null using isset().