Redirection
To avoid the double submit problem it is necessary to split the validation page in two. The first will only validade and commit to the data...
User Registration
Registering a user requires that he fills some information and that the information be valid. So we will setup two pages, one with a form t...
Post versus Get
We have used the GET method of the <form> tag: < form method = " GET " > < / form > We saw it appends a...
Parameter errors
If you tried to call preferences.php without the query string you may have noticed the strange behavior. View the page source and pay att...
Forms
The HTML <form> tag will let the user fill in the necessary information and pass it in a query string to another or to the same pag...
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