is er een replace functie??

<?php
   echo'<center><table border="1"><tr><td>';

echo'
<center>Geld op bank </br>
'.$row['bank'];

echo'<center><tr><td><form action="" method="post">
<center>Opnemen bedrag </br>
<input type="text" name="geld"></br>
<input type="submit" value="Submit" /></form><tr>';



$con = mysql_connect("x","coendamiaan","x");
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }
mysql_select_db("coendamiaan", $con);


if(($_POST['geld'])){

$sql2="DELETE FROM users WHERE test (bank)";
$sql3="DELETE FROM users WHERE test (money)";

$sql="INSERT INTO users WHERE test (bank, money)
VALUES ('$_POST[bankgeld]','$_POST[geld]')";

   }

if (!mysql_query($sql,$con))
  {
  die('Error: ' . mysql_error());
  }
echo "gestort.";
mysql_close($con)

?>











<?php

mysql_connect("x", "x", "x") or die(mysql_error());
mysql_select_db("coendamiaan") or die(mysql_error());

$query = "SELECT * FROM users";

$result = mysql_query($query) or die(mysql_error());


$row = mysql_fetch_array($result) or die(mysql_error());



echo'<center><table border="1"><tr><td>';

echo'
<center>Geld op bank </br>
'.$row['bank'];




?>