When working with PHP, you may need to retrieve an integer formatting attribute. This guide explains the operation, shows what its arguments mean, and uses three separate examples to make the result easier to understand.
NumberFormatter::getAttribute: Attributes determine settings such as the number of fraction digits.
What Is NumberFormatter::getAttribute in PHP?
Retrieve an integer formatting attribute. Attributes determine settings such as the number of fraction digits.
Syntax:
$formatter->getAttribute(int $attribute): int|float|false
Parameters and return value: The signature above identifies the arguments and return type where the API has a single call. For topic guides, follow the sequence of calls in the examples. Always distinguish a returned value from an object or variable modified by reference.
Important: Different attributes have different meanings. Use NumberFormatter constants rather than unexplained integers.
Example 1: Basic Usage
This example introduces the operation with a short and predictable input.
<?php
$formatter = new NumberFormatter("en_US", NumberFormatter::DECIMAL);
echo $formatter->getAttribute(NumberFormatter::MAX_FRACTION_DIGITS);
The code focuses on the main operation. Attributes determine settings such as the number of fraction digits.
Example 2: Another Case
Now compare a different input, locale, date, or option to see another part of the behavior.
<?php
$formatter = new NumberFormatter("en_US", NumberFormatter::DECIMAL);
echo $formatter->getAttribute(NumberFormatter::GROUPING_USED);
What changes? Different attributes have different meanings. Use NumberFormatter constants rather than unexplained integers.
Practical Example: Applying It in an Application
Use the following separate example as a starting point for a small application task. Check any extension or environment requirements below before running it.
<?php
$formatter = new NumberFormatter("en_US", NumberFormatter::DECIMAL);
$formatter->setAttribute(NumberFormatter::MAX_FRACTION_DIGITS, 2);
echo $formatter->getAttribute(NumberFormatter::MAX_FRACTION_DIGITS);
The practical example demonstrates how to apply this operation to multiple values, a reusable task, or a validated input. Attributes determine settings such as the number of fraction digits.
Important Behavior and Edge Cases
- Core behavior: Attributes determine settings such as the number of fraction digits.
- Inputs and results: Different attributes have different meanings. Use NumberFormatter constants rather than unexplained integers.
- Alternatives: NumberFormatter::setAttribute() changes numeric attributes.
- Compatibility: The intl extension is required.
Comparison With Related Functions
| Function or Approach | When to Use It |
|---|---|
NumberFormatter::getAttribute | Retrieve an integer formatting attribute. |
| Related PHP approach | NumberFormatter::setAttribute() changes numeric attributes. |
Common Beginner Mistakes
| Mistake | Correct Approach |
|---|---|
| Using an incorrect input or option | Different attributes have different meanings. Use NumberFormatter constants rather than unexplained integers. |
| Confusing this API with a related operation | NumberFormatter::setAttribute() changes numeric attributes. |
| Assuming output is identical across environments | Check return values and required extensions or versions. The intl extension is required. |
Key Takeaways
- NumberFormatter::getAttribute helps you retrieve an integer formatting attribute.
- Attributes determine settings such as the number of fraction digits.
- Different attributes have different meanings. Use NumberFormatter constants rather than unexplained integers.
Use NumberFormatter::getAttribute when you need to retrieve an integer formatting attribute. Start with the first example, compare the second, and adapt the practical example to your inputs. Confirm the return value and environment requirements before adding it to production code.