Sometimes you need to check whether a specific PHP function is enabled on your hosting account. On ruachost.com, you can do this using the built‑in function_exists() function.
Why Check Function Availability?
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Hosting environments may disable certain PHP functions for security reasons.
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Ensures your script won’t break if a function is unavailable.
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Helps you write portable code that works across different servers.
Using the function_exists() Function
The function_exists() function returns true if the specified function is available, and false if it is not.
Example: Checking for fsockopen()
<?php
$function_name = "fsockopen";
if (function_exists($function_name)) {
echo "$function_name is enabled";
} else {
echo "$function_name is not enabled";
}
?>
Steps:
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Save the file as
function.php. -
Upload it to your
public_htmldirectory. -
Visit
http://yourdomain.com/function.php. -
The page will display whether the function is enabled.
More Information
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