If the PHP directory?

If the PHP handbook describes all operators, teams, etc., like in the dictionary? And where can you find it if it exists? For example:
abs
(PHP 3, PHP 4, PHP 5)
abs  Number module
Description
number abs ( mixed number )
Returns the absolute number. If the number has a float type, the return will also have a float type, otherwise integer.
Example 1. Example
<?php $abs = abs(4.2); // $abs = 4.2; (double/float) $abs2 = abs(5); // $abs2 = 5; (integer) $abs3 = abs(5); // $abs3 = 5; (integer) ?>
And so for everyone.

Yes, of course. http://www.php.su/functions/?abs ♪
P.S. To be honest, I'd rather just be in the Yandex trying to find a type. "PHP" and calmly read (although in most cases I'm hitting this site anyway).