submit and onsubmit (transfer)

Occurrence sequence: onsubmit -> submit

1. Prevent form submission:

<script><br>function submitFun(){<br>                                       return true;            Allow form submission <br>                                         return false; // Form submission is not allowed<br>}<br></script>

reture
submitFun();">
//Note that value="submit"> cannot be written here


The above introduces submit and onsubmit (transfer), including aspects of content. I hope it will be helpful to friends who are interested in PHP tutorials.