How can PHP developers ensure their scripts are secure while still allowing necessary file write permissions?

To ensure PHP scripts are secure while still allowing necessary file write permissions, developers can implement proper input validation, sanitize user input, and use secure file handling techniques such as checking file permissions before writing to them. Additionally, developers should avoid using functions like eval() and ensure that their server configurations are secure to prevent unauthorized access to files. 

$file = 'example.txt';
if (is_writable($file)) {
    $data = 'Data to write to the file';
    file_put_contents($file, $data);
    echo 'File was successfully written.';
} else {
    echo 'File is not writable.';
}

Keywords

PHP security file write permissions open_basedir safe mode

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