What potential reasons could lead to a PHP script being executed twice, as described in the forum thread?

The potential reasons for a PHP script being executed twice could be due to browser caching, server misconfigurations, or multiple requests being sent to the script unintentionally. To solve this issue, you can implement a unique identifier check at the beginning of your script to ensure it only runs once per request. 

// Check if script has already been executed
if (!defined('RAN_ONCE')) {
    define('RAN_ONCE', true);
    
    // Your PHP script code goes here
}

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PHP script execution twice forum thread potential reasons

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