Use get_extension_funcs() when you need to lists functions exported by a specified loaded PHP extension in a PHP application. The examples below show the actual operation and its limitations.
What Is get_extension_funcs() in PHP?
Lists functions exported by a specified loaded PHP extension. The exact signature supported by your installation depends on its PHP version and enabled extensions.
Its syntax is:
get_extension_funcs(string $extension): array|falseParameters and return value: The parameter types, optional arguments, references, and return type are shown in the signature above. Optional parameters are marked with an ellipsis in this reference signature.
Example 1: Basic Usage
<?php
$functions = get_extension_funcs("standard"); echo is_array($functions) ? "Found" : "Unavailable";Result: Run the example in an environment that supports the function. Any values depending on operating-system state, installed extensions, process configuration, or network access must be checked on the target server.
Example 2: Different Input or Behavior
<?php
$functions = get_extension_funcs("json"); echo is_array($functions) ? "JSON extension loaded" : "Missing";Result: Run the example in an environment that supports the function. Any values depending on operating-system state, installed extensions, process configuration, or network access must be checked on the target server.
Practical Example: Applying the Function
<?php
$extensionName = "zlib"; $functions = get_extension_funcs($extensionName); echo $functions === false ? "Not loaded" : count($functions) . " functions";Result: Run the example in an environment that supports the function. Any values depending on operating-system state, installed extensions, process configuration, or network access must be checked on the target server.
Important Behavior and Edge Cases
The result may differ across PHP builds; a missing extension returns false.
Comparison With Related Functions
| Approach | Difference |
|---|---|
get_extension_funcs() | Lists functions exported by a specified loaded PHP extension. |
| Related operation | get_loaded_extensions() lists extensions; get_extension_funcs() lists one extension’s functions. |
Common Beginner Mistakes
| Mistake | Correct Approach |
|---|---|
| Ignoring the function-specific limitation | The result may differ across PHP builds; a missing extension returns false. |
| Confusing this function with a related operation | get_loaded_extensions() lists extensions; get_extension_funcs() lists one extension’s functions. |
Key Takeaways
- Lists functions exported by a specified loaded PHP extension.
- The result may differ across PHP builds; a missing extension returns false.
- get_loaded_extensions() lists extensions; get_extension_funcs() lists one extension’s functions.
Use get_extension_funcs() for the specific operation demonstrated above. Check its prerequisites and handle failure conditions before using it with production data.