CI form validation class

About the CI form verification class I encountered a problem when writing code, $ this-& gt; form_validation-& gt; run () & nbsp ;==& nbsp; FALSE cannot work normally. I am running CodeIgniter User Guide Version 2.1.0. why is it not possible to explain the examples in form verification? Which of the following statements about CI form verification?
I encountered a problem when writing code. $ this-> form_validation-> run () = FALSE cannot work normally. I am running CodeIgniter User Guide Version 2.1.0. why is it not possible to explain the examples in form verification? Which big brother gave me some advice? thank you!
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If you leave the blank form field to submit the form, you will see the error message. If you fill in all form fields and submit the form, you will see the success page.
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Php code
$ This-> form_validation-> set_rules ('product _ name', 'product', 'required ');
If ($ this-> form_validation-> run () = TRUE ){

}

Foreground html
"/>


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Form verification class is spam