Why Am I Getting the \'PHP Fatal error: Cannot redeclare class\' Error?

Understanding the "PHP Fatal error: Cannot redeclare class" Problem

When attempting to define a class in PHP, you may encounter the error "PHP Fatal error: Cannot redeclare class." This error indicates that a class with the same name has already been declared somewhere in your code.

Causes:

The most likely cause of this error is multiple declarations of the same class. This can occur when you include or require the same PHP file multiple times, inadvertently redefining the class.

Solution:

To resolve this issue, ensure that each class is declared only once in your application. This means using the include_once or require_once statements to prevent multiple inclusions. These statements will check if the file has already been included before executing its contents, thus preventing multiple class declarations.

Example:

include_once "ClassFile.php"; // Includes the class file only once

By enforcing single class declarations, you can eliminate the "Cannot redeclare class" error and ensure that your PHP application executes correctly.

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