Modern PHP: Difference between revisions
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Generators are forward-only iterators, i.e. you can only request the next value, not the previous, next but one etc. They are useful for iterating sequential data sets such as reading a file line by line (in order). | Generators are forward-only iterators, i.e. you can only request the next value, not the previous, next but one etc. They are useful for iterating sequential data sets such as reading a file line by line (in order). | ||
== Autoloading == | |||
The original mechanism for autoloading was the magic function <code>__autoload()</code>. This is no longer recommended and is deprecated in PHP 7.x. | |||
The successor to <code>__autoload()</code> is <code>spl_autoload_register()</code>. This in turn has been replaced by PSR-0, then PSR-4. Composer will generate a PSR-4 autoloader for you. | |||
== Built-in web server == | == Built-in web server == | ||
Revision as of 12:12, 18 April 2018
Generators
Generators are similar to iterators that calculate their values on demand, thus potentially using fewer resources. They can be created using the yield keyword, e.g.:
function my_generator()
{
yield 1;
yield 2;
yield 3;
}
Generators are forward-only iterators, i.e. you can only request the next value, not the previous, next but one etc. They are useful for iterating sequential data sets such as reading a file line by line (in order).
Autoloading
The original mechanism for autoloading was the magic function __autoload(). This is no longer recommended and is deprecated in PHP 7.x.
The successor to __autoload() is spl_autoload_register(). This in turn has been replaced by PSR-0, then PSR-4. Composer will generate a PSR-4 autoloader for you.
Built-in web server
PHP comes with a built-in web server which is useful for development purposes, although it should never be used in production.
- Configuration directives:
-c config/php.ini
Useful dependencies
- FastRoute
aura/routerorleague/route