Why Does PHP Throw a 'Fatal error: [] operator not supported for strings' Error?

Fatal Error: Understanding the [] Operator Error for Strings

When working with arrays and strings in PHP, it's crucial to understand the usage of the [] operator. Attempting to use this operator on strings can result in the error: "Fatal error: [] operator not supported for strings."

The Error's Cause:

This error occurs because the [] operator is used to manipulate arrays. It is not permissible to use it on strings. When you try to assign values to an array using the [] operator, you are attempting to create or modify an element of the array. However, strings are not containers like arrays and cannot be manipulated in the same way.

Problem Description:

In the provided code, the issue arises when you try to save modified information to a database using the $wrotesql variable. You are attempting to assign an array to a column that expects a string. In particular, you are trying to assign the element $text[$nro] to the column, which is a string.

Solution:

To resolve this error, ensure that the variables $name, $date, $text, and $date2 are initialized as strings, not arrays. You can do this by removing the [] from the assignment statements, as shown below:

$name = $row['name'];
$date = $row['date'];
$text = $row['text'];
$date2 = $row['date2'];

With these changes, the $wrotesql variable will be correctly formatted as a string, and the code will execute successfully.

Additional Note for PHP 7:

In PHP 7 and later versions, using the [] operator on undeclared variables to create arrays is permissible. However, using it on variables that have already been declared as strings or other types will still result in the error.

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