Uzyskaj wartość pola tekstowego w PHP

<form method="post">
  <input type="text" name="deleteinput" class="button"/>
  <input type="submit" name="deletebtn" class="button" value="Delete single user data"/>
</form>
  // php 
<?php 
    $name = $_GET['deletebtn'];
    echo $name;
?>
  
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