In what scenarios would using file_exists, is_writable, and is_readable functions be beneficial when working with text files in PHP?

When working with text files in PHP, it is important to ensure that the file exists, is writable, and is readable before performing any operations on it. Using the file_exists function allows you to check if the file exists, is_writable function checks if the file is writable, and is_readable function checks if the file is readable. This helps prevent errors and ensures that your script can safely read from and write to the file. 

$file = 'example.txt';

if (file_exists($file) && is_writable($file) && is_readable($file)) {
    // Perform operations on the file
    $content = file_get_contents($file);
    echo $content;
} else {
    echo "The file is not accessible.";
}

Keywords

file_exists is_writable is_readable text files PHP

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