Submit event

Hello, does anyone knows why this script won´t work? It doesn´t enter the first ‘if’ after I press the submit button. Could it be something with my php configuration? Thanks

<?php

if ($submit) {
echo “Entered if”;
}

else{
?>
<div align=”center”>
<table border=”5″>
<tr><td>
<center>
<form method=”post” action=”<?php echo $PHP_SELF?>”>
<p>Test: <input name=”remove” size=”8″></p>
<input type=”Submit” name=”submit” value=”Delete”>
</form>
</center>
</td></tr>
</table>
</div>
<?php
}
?>

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