When working with PHP, you may need to read or set the candidate encoding detection order. This guide explains the operation, shows what its arguments mean, and uses three separate examples to make the result easier to understand.
mb_detect_order: The detection order affects the default candidates used by mb_detect_encoding().
What Is mb_detect_order in PHP?
Read or set the candidate encoding detection order. The detection order affects the default candidates used by mb_detect_encoding().
Syntax:
mb_detect_order(array|string|null $encoding = null): array|bool
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: Changes affect subsequent operations in the current execution context. Prefer specifying encodings directly when detecting.
Example 1: Basic Usage
This example introduces the operation with a short and predictable input.
<?php
print_r(mb_detect_order());
The code focuses on the main operation. The detection order affects the default candidates used by mb_detect_encoding().
Example 2: Another Case
Now compare a different input, locale, date, or option to see another part of the behavior.
<?php
$original = mb_detect_order();
mb_detect_order(["UTF-8", "ISO-8859-1"]);
print_r(mb_detect_order());
mb_detect_order($original);
What changes? Changes affect subsequent operations in the current execution context. Prefer specifying encodings directly when detecting.
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
$previousOrder = mb_detect_order();
try {
mb_detect_order(["UTF-8", "ISO-8859-1"]);
var_dump(mb_detect_encoding("Café"));
} finally {
mb_detect_order($previousOrder);
}
The practical example demonstrates how to apply this operation to multiple values, a reusable task, or a validated input. The detection order affects the default candidates used by mb_detect_encoding().
Important Behavior and Edge Cases
- Core behavior: The detection order affects the default candidates used by mb_detect_encoding().
- Inputs and results: Changes affect subsequent operations in the current execution context. Prefer specifying encodings directly when detecting.
- Alternatives: mb_detect_encoding() performs the actual detection.
- Compatibility: mbstring is required for mb_* functions.
Comparison With Related Functions
| Function or Approach | When to Use It |
|---|---|
mb_detect_order | Read or set the candidate encoding detection order. |
| Related PHP approach | mb_detect_encoding() performs the actual detection. |
Common Beginner Mistakes
| Mistake | Correct Approach |
|---|---|
| Using an incorrect input or option | Changes affect subsequent operations in the current execution context. Prefer specifying encodings directly when detecting. |
| Confusing this API with a related operation | mb_detect_encoding() performs the actual detection. |
| Assuming output is identical across environments | Check return values and required extensions or versions. mbstring is required for mb_* functions. |
Key Takeaways
- mb_detect_order helps you read or set the candidate encoding detection order.
- The detection order affects the default candidates used by mb_detect_encoding().
- Changes affect subsequent operations in the current execution context. Prefer specifying encodings directly when detecting.
Use mb_detect_order when you need to read or set the candidate encoding detection order. 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.