Salting, Hashing and like stuffs question

Personally, I use something along the lines of the following:

$salt = sha1(md5($_POST['password']));
$password = md5($_POST['password'].$salt);

Using strings such as username or user id is not a good idea as these will be known by anyone using the site, but using the password means that it is unique for each user without having to save the sale string anywhere.

Also, providing you salt the password, then MD5 should be fine :)

Personally, I use something along the lines of the following:

$salt = sha1(md5($_POST['password']));
$password = md5($_POST['password'].$salt);

Using strings such as username or user id is not a good idea as these will be known by anyone using the site, but using the password means that it is unique for each user without having to save the sale string anywhere.

Also, providing you salt the password, then MD5 should be fine :)

If password is the same then hash will be the same isn't it? What is your opinion on random salt?

I agree with Gresham but beg to defer on the code an not concept.
Example:

function truehash($input) {
return hash('sha1',substr(hash('sha1',$input),4,-4).hash('crc32',$input));
}

I agree with Gresham but beg to defer on the code an not concept.
Example:

function truehash($input) {
return hash('sha1',substr(hash('sha1',$input),4,-4).hash('crc32',$input));
}

Why you don't agree with Will?

Why you don't agree with Will?

Because if the sha1 and md5 algorithms are cracked then the entire salt and encryption Will suggested can be cracked. However with my method part of the original hash has been destroyed with substr and you would need a lot of guess work before getting the decoded result. So therefore mine is more secure.

Cool I understand now.
I need to hear also your comments on pros and cons of random one and how to achieve it. Just idea