Reports whether APCu is available for the current PHP process.
What Is apcu_enabled() in PHP?
Reports whether APCu is available for the current PHP process.
Its syntax is:
apcu_enabled(): boolParameters:
Return type: bool. A CLI process may have APCu disabled even when the web server uses it. First test function_exists() when APCu might be absent.
Availability: Requires APCu enabled for the current PHP SAPI.
Example 1: Basic Usage
<?php
var_dump(apcu_enabled());
Result: Results and availability depend on the current PHP process, system permissions, cache, filesystem or installed locale. A CLI process may have APCu disabled even when the web server uses it. First test function_exists() when APCu might be absent.
Example 2: A Different Input
<?php
echo apcu_enabled() ? "Cache available" : "Cache unavailable";
Result: Results and availability depend on the current PHP process, system permissions, cache, filesystem or installed locale. A CLI process may have APCu disabled even when the web server uses it. First test function_exists() when APCu might be absent.
Practical Example: Applying It in a Program
<?php
if (function_exists("apcu_enabled") && apcu_enabled()) {
apcu_store("health", "ok", 30);
} else { echo "Using uncached fallback"; }
Result: Results and availability depend on the current PHP process, system permissions, cache, filesystem or installed locale. A CLI process may have APCu disabled even when the web server uses it. First test function_exists() when APCu might be absent.
Important Behavior and Edge Cases
- Key behavior: A CLI process may have APCu disabled even when the web server uses it. First test function_exists() when APCu might be absent.
- Environment: Requires APCu enabled for the current PHP SAPI.
Comparison With Related Functions
| Function | Purpose |
|---|---|
apcu_enabled() | reports whether APCu is available for the current PHP process. |
extension_loaded() | extension_loaded("apcu") checks installation; apcu_enabled() checks that APCu can be used in the current environment. |
Common Beginner Mistakes
| Mistake | Correct Approach |
|---|---|
| Ignoring this behavior: A CLI process may have APCu disabled even when the web server uses it | A CLI process may have APCu disabled even when the web server uses it. First test function_exists() when APCu might be absent. |
Key Takeaways
- reports whether APCu is available for the current PHP process.
- A CLI process may have APCu disabled even when the web server uses it. First test function_exists() when APCu might be absent.
- Requires APCu enabled for the current PHP SAPI.
Summary: A CLI process may have APCu disabled even when the web server uses it. First test function_exists() when APCu might be absent.