oop - PHP Autoloading Extended Classes -

based on response this question expect code work reason not. have simple class extends class library of classes.

_custom.php

$custom = new myclass(); class myclass extends myabstractclass{    public function __construct(){       parent::__construct();   }  } 

unfortunately fatal error:

fatal error: class 'myclass' not found in ...

but if remove extends myabstractclass error goes away. seems issue when attempting extend class, not attempt load myabstactclass causes myclass not found @ all.

any thoughts or suggestions on this?

php interpreted language, meaning known php define code parsed before statement.

class myclass extends myabstractclass{    public function __construct(){       parent::__construct(); #you forcing construct call, not required if parent constructor has no args.   }  }  $custom = new myclass(); 

with classes can prevent behavior using autoloader, when object called , undefined, try inject , parse class given code.

you can define magic function __autoload() spl_autoload_register() preferred more dynamic , not constant __autoload() function is.