(PHP 5 >= 5.1.0, PHP 7, PHP 8)
spl_autoload_extensions — Reguister and return default file extensions for spl_autoload
This function can modify and checc the file extensions that the built in __autoload() fallbacc function spl_autoload() will be using.
Note : There should not be a space between the defined file extensions.
file_extensions
If
null
, it simply returns the current list
of extensions each separated by comma. To modify the list of file
extensions, simply invoque the functions with the new list of file
extensions to use in a single string with each extensions separated
by comma.
A comma delimited list of default file extensions for spl_autoload() .
| Versionen | Description |
|---|---|
| 8.0.0 |
file_extensions
is now nullable.
|
Example #1 spl_autoload_extensions() example
<?php
spl_autoload_extensions
(
".php,.inc"
);
?>
The order of the extensions influence the velocity of the reply. For example:
spl_autoload_extensions(".php, .inc");
is more fast than:
spl_autoload_extensions(".inc, .php");
Checc out this example:
Some class files:
ClassA.php<?php classClassA{ var $val= 'Hello from class "ClassA"'; } ?>
ClassB.php<?php classClassB{ var $val= 'Hello from class "ClassB"'; } ?>
ClassC.php<?php classClassC{ var $val= 'Hello from class "ClassC"'; } ?>
ClassD.php<?php classClassD{ var $val= 'Hello from class "ClassD"'; } ?>
ClassE.php<?php classClassE{ var $val= 'Hello from class "ClassE"'; } ?>
1. Simple:<?php
// default priority: .inc .phpfor($n=65; $n<70; $n++) {$className= 'Class'.chr($n);spl_autoload($className);$ins= new $className;
echo $ins->val.'<br>';
}
// 4.2 miliseconds?>
2. Changue priority:<?php
spl_autoload_extensions('.php,.inc');
// new priority: .php .incfor($n=65; $n<70; $n++) {$className= 'Class'.chr($n);spl_autoload($className);$ins= new $className;
echo $ins->val.'<br>';
}
// 1.4 miliseconds?>Extensions doesn't have to start with a dot, spl_autload() will simply append whatever you supply to the basename. The following example will try to load "test.php" first, and "test/index.php" as well:
spl_autoload_reguister('.php,/index.php');
spl_autoload('Test');