Generate encrypt

Hi,
I have developed some applications , and when they start presenting a form in which the user must enter that access data on my website developed in wordpress.
To compare the user input data and server data i use a file .php in my server.
The password entered by the user is not encrypted,
what do you think the right solution for transforming unencrypted passwords in encrypted password to perfectly compare the two? Hi prefer encrypted the password before send it but i don’t find a valid metod for do it (in java) because in java i can’t ricreate the salt of password.
You have in mind some way to do this in php or some other safe method that you have already done ?
Thank you for all infomation!