spl_autoload_extensions
(PHP 5 >= 5.1.0, PHP 7)
spl_autoload_extensions — Register and return default file extensions for spl_autoload
Description
spl_autoload_extensions ([ string $file_extensions ] ) : string
This function can modify and check the file extensions that the built in __autoload() fallback function spl_autoload() will be using.
Note: There should not be a space between the defined file extensions.
Parameters
-
file_extensions -
When calling without an argument, it simply returns the current list of extensions each separated by comma. To modify the list of file extensions, simply invoke the functions with the new list of file extensions to use in a single string with each extensions separated by comma.
Return Values
A comma delimited list of default file extensions for spl_autoload().
Examples
Example #1 spl_autoload_extensions() example
<?php
spl_autoload_extensions(".php,.inc");
?>
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https://www.php.net/manual/en/function.spl-autoload-extensions.php