How can debugging techniques be applied to troubleshoot PHP functions like "mkdir" in the context of directory creation?

When troubleshooting PHP functions like "mkdir" for directory creation, it is important to check for common issues such as incorrect file paths, insufficient permissions, or existing directories with the same name. To debug the issue, you can use error handling techniques like checking for error codes returned by the function or using the "is_dir" function to verify if the directory already exists before attempting to create it. 

$dir = "path/to/directory";

if (!is_dir($dir)) {
    if (!mkdir($dir, 0777, true)) {
        die('Failed to create directory');
    }
    echo 'Directory created successfully';
} else {
    echo 'Directory already exists';
}

Keywords

PHP debugging techniques mkdir function directory creation troubleshooting

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