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if all the fields are filled then only the insert into should come into act.
This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, Math ML, etc.
These validation rules are basically a LIST (or an array for the technically-literate), saying which form fields need to validated, in what way, and what errors should be displayed to the user if they’re not filled in properly. Add some display code into your page which will output any errors that occur.
if the user leaves anyone of them, it should show an alert message like "Please enter the name, it cannot be blank".
You may opt for sending form data to a different file.
Validation for non-empty, alphabets and whitespace only The following code is added within the form So, if you try to understand how to write code for it step by step, step 1 is to declare the mail address to whom you want to send mail, step 2 is to write subject of the mail, step three is to collect data from POST so that you can write them to the body of mail, step 4 is to declare the mail id from which the mail is coming and finally sent mail with PHP mail() function.
Calling the validate Fields() function passes in the rules you’ve made up, and returns a list of errors that occurred.
These errors are then outputted to the page for the user to fix.