Modern PHP DOM classes help applications parse and save structured documents. Parses a local XML document into a modern Dom XMLDocument. The API is separate from the older DOMDocument class.
What Is Dom\XMLDocument::createFromFile() Method?
Parses a local XML document into a modern Dom XMLDocument.
Its syntax is:
public static Dom\XMLDocument::createFromFile(string $path, int $options = 0): Dom\XMLDocument
The parameters are:
string $path— A local path to open or save, controlled by the application.int $options = 0— Optional configuration flags or parsing settings.
Return value: The declared return type is Dom\XMLDocument. Untrusted XML requires deliberate parser configuration; missing files and malformed documents require error handling.
Requirements: Requires PHP 8.4 or later with the DOM extension enabled. These examples are intended for local files.
Important: Untrusted XML requires deliberate parser configuration; missing files and malformed documents require error handling.
Example 1: Basic Usage
The basic example focuses on the behavior of Dom\XMLDocument::createFromFile() Method: parses a local XML document into a modern Dom XMLDocument. Inputs are defined locally or shown as application-controlled paths.
<?php
$document = Dom\XMLDocument::createFromFile(__DIR__ . "/sample.xml");
echo $document->documentElement->nodeName;
The displayed value, file content or return status depends on the input and surrounding environment. Results involving local paths, identifiers or generated files are not fixed values.
Example 2: A Different Use Case
This second example illustrates another input or execution condition for Dom\XMLDocument::createFromFile() Method. Notice the different checks, arguments, or output handling.
<?php
$document = Dom\XMLDocument::createFromFile(__DIR__ . "/feed.xml");
echo $document->documentElement->localName;
This variation matters because untrusted XML requires deliberate parser configuration; missing files and malformed documents require error handling.
Practical Example: Using the Operation in an Application
The following example demonstrates how Dom\XMLDocument::createFromFile() Method fits into a more complete file or archive workflow, including inputs and appropriate checks.
<?php
$document = Dom\XMLDocument::createFromFile(__DIR__ . "/catalog.xml");
foreach ($document->getElementsByTagName("item") as $item) { echo $item->getAttribute("id") . "\n"; }
The operation shown is an illustrative script. Adapt the filenames, required permissions, and error handling to your own controlled application environment before running it.
Important Behavior and Edge Cases
- Function behavior: Parses a local XML document into a modern Dom XMLDocument.
- Limitation: Untrusted XML requires deliberate parser configuration; missing files and malformed documents require error handling.
- Availability: Requires PHP 8.4 or later with the DOM extension enabled. These examples are intended for local files.
Comparison With Related Functions
| Function or Method | Difference |
|---|---|
Dom\XMLDocument::createFromFile() Method | Parses a local XML document into a modern Dom XMLDocument. |
Dom\XMLDocument::createFromString() | Parses XML already held in memory instead of reading a file. |
Use Dom\XMLDocument::createFromFile() Method for the specific behavior described above. The related operation, Dom\XMLDocument::createFromString(), serves a different purpose; do not substitute it unless that different behavior is intended.
Common Beginner Mistakes
| Mistake | Correct Approach |
|---|---|
| Assuming this method is available on every PHP installation. | Untrusted XML requires deliberate parser configuration; missing files and malformed documents require error handling. Check the required PHP version and extension while deploying the example. |
| Treating Dom\XMLDocument::createFromString() as an interchangeable replacement for Dom\XMLDocument::createFromFile() Method. | Parses XML already held in memory instead of reading a file. |
Key Takeaways
- Parses a local XML document into a modern Dom XMLDocument.
- Untrusted XML requires deliberate parser configuration; missing files and malformed documents require error handling.
- Related operation: Dom\XMLDocument::createFromString() — Parses XML already held in memory instead of reading a file.
Dom\XMLDocument::createFromFile() Method is useful when its specific behavior matches your application requirement. Keep paths controlled, check failures, and handle environment-dependent operations deliberately.