Is this php behaviour explained somewhere in manual? (strings with zeroes comparison)

Question

Why for php

\'00\' == \'0000\'

expression is true?

Is it explained somewhere in manual?

NOTE:

Answer 1

Sure

== compares values and neglects type
=== compares values and types

here is it:

http://php.net/manual/en/language.operators.comparison.php

*UPDATE:

Read this part in this URL :

http://php.net/manual/en/function.intval.php

Strings will most likely return 0 although this depends on the leftmost characters of the string. The common rules of integer casting apply.