How can the clearstatcache() function affect the results of file_exists in PHP?

The clearstatcache() function in PHP clears the file status cache, which can affect the results of file_exists() by causing it to return incorrect results if called after clearstatcache(). To solve this issue, you should avoid using clearstatcache() when checking for file existence with file_exists() in the same script. 

// Avoid using clearstatcache() before calling file_exists()
$file = 'example.txt';

if (file_exists($file)) {
    echo "File exists.";
} else {
    echo "File does not exist.";
}

Keywords

clearstatcache file_exists PHP function results

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