Description:
------------
After studying some string issues I think we need one more page in manual about strings comparison with a link to/from strcmp. Few confusing examples from user-notes on http://www.php.net/manual/en/language.types.string.php

And I haven't found any clear answer about is === operator equal to strcmp() if two arguments are strings with numbers in the beginning? 

Many coders use "==" instead of "strcmp" and there should be warning somewhere in manual about possible problems that could arise due to such misuse.

See also: 
http://bugs.php.net/bug.php?id=28200

Reproduce code:
---------------
<?php
$x1 = '111111111111111111';
$x2 = '111111111111111112';
echo ($x1 == $x2) ? "true\n" : "false\n"; //true
?>

<?
$hello='hi there';
echo($hello?'true':'false');         //true
echo($hello==0?'true':'false');      //true!!!!!
echo($hello===0?'true':'false');     //false
?>