Use session in php to avoid repeated submission of forms during page refreshing

: This article describes how to use session in php to avoid repeated submission of forms during page refreshing. For more information about PHP tutorials, see. (1) PHP section

Session_start (); $ sign = $ _ SESSION ['code']; $ sscode = mt_rand (0,); $ this-> assign ("sscode", $ sscode ); // pass the random value to if (isset ($ _ POST ['submit ']) in html) {// isset ($ _ POST ['submit']) to determine whether a form is submitted // $ _ POST ['submit _ sign'] is a value of the hidden field in the form if ($ _ POST ['submit _ sign'] = $ sign) {// process form data} else {echo "script" alert ('Do not submit forms repeatedly ') script "}

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