How can PHP developers ensure that file paths are correctly constructed and passed to functions like fopen for file manipulation tasks?

To ensure that file paths are correctly constructed and passed to functions like fopen in PHP, developers should use the `realpath()` function to get the absolute path of the file. This helps in resolving any relative paths and ensures that the correct file path is used for file manipulation tasks. 

$file_path = '/path/to/file.txt';
$absolute_path = realpath($file_path);

if ($absolute_path) {
    $file_handle = fopen($absolute_path, 'r');
    // Perform file manipulation tasks
    fclose($file_handle);
} else {
    echo "Invalid file path";
}

Keywords

PHP file paths fopen file manipulation error handling

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