php clear text printed to webpage

Question

I have a html/php script which prints a text string directly to the page. However when I refresh the page that text is still there. I've googled this and check this forum too and tried various suggestions e.g.

<input autocomplete="off">

and

<body onload="document.FormName.reset();">

etc. None of them work.

The php code that prints the string is (if regex matches serial number then execute command else print error string):

if (preg_match($snregex, $sn, $matches)) {
  <command>
} else {
  echo "Invalid SN. Please re-enter!";
}

Should I print the string using a different way that can be cleared on refresh?

Could you share code snippet?

Amy
– Amy

2014-10-09 12:21:13 +00:00
Commented Oct 9, 2014 at 12:21 — Amy
– Amy, Commented Oct 9, 2014 at 12:21

Ronser · Accepted Answer · 2014-10-09 13:22:09Z

1

if (preg_match($snregex, $sn, $matches)) {
 <command>
} else {
  //echo "Invalid SN. Please re-enter!";
 }

try commenting the echo and check if the text is still there.

if not, every time the else loop gets executed and prints the statement.

solution:

if(isset($_POST['submit']) && (preg_match($snregex, $sn, $matches))
{
 <command>
} else {
  echo "Invalid SN. Please re-enter!";
 }

edited Oct 9, 2014 at 13:22

answered Oct 9, 2014 at 12:33

Ronser

1,8756 gold badges20 silver badges38 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Ronser Over a year ago

is the text gets printed in your page or in a text field??

stevo Over a year ago

Looks like that was it. Commenting it out removed it.

Ronser Over a year ago

use the condition inside a submit event or so, it won't print unless its executed... SEE SOLUTION...

Billy · Accepted Answer · 2014-10-09 12:41:50Z

0

Is it printing out from a session or post var that's not getting cleared ? is the input field something like

input value="<?php if(isset($_POST['serial_number'])){echo S_POST['serial_number'];}?>"

answered Oct 9, 2014 at 12:41

Billy

2,4381 gold badge13 silver badges13 bronze badges

Collectives™ on Stack Overflow

php clear text printed to webpage

2 Answers 2

3 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

3 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related