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Editorial Team
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Asked: 2026-05-22T20:24:27+00:00

<body> <?php if(isset($_POST[‘vendor_add_submit’])){ //INSERT INTO DB unset( $_POST[‘vendor_add_submit’] ); } ?> <form method=post action=<?php

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<body>

<?php

if(isset($_POST['vendor_add_submit'])){

//INSERT INTO DB

unset(  $_POST['vendor_add_submit'] );
}

?>


<form method="post" action="<?php echo $_SERVER['PHP_SELF'] ?>" >


<label>Email</label>
<input type="text" name="vendor_email" value="" />


<input type="submit" name="vendor_add_submit" value="SAVE" />


</form>
</body>

unset( $_POST['vendor_add_submit'] ); is used to prevent more than one time insertion into db on page refresh. I tested with print_r($_POST['vendor_add_submit'] ) before and after the unset and found that the unset() function does not work.

How can I achieve the purpose of the unset function, plz?

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1 Answer

  1. Editorial Team

    Unset isn’t going to stop the refresh from being able to replay the POSTed data to the script. The unset function eliminated it for the remaining execution of that script, but a refresh is a fresh execution.

    You could simply re-direct the browser to the entry pageafter doing your insert, that way a subsequent refresh will be safe. 

    //INSERT INTO DB
//...
header('Location: samepage.php');
exit();

    I’m sure there are other ways to accomplish this as well.

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