Help editing web crawler code

[anon]

Hi, here's the code for a web crawler which I found at www.spiderbyte.org

#
<?php
#

#
// Simple Spider Build v1.0 Beta
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// Coded By Black Widow ¤ SpiderByte.Org ¤
#

#
// Start The Spider
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$ch = curl_init();
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curl_setopt($ch, CURLOPT_URL,"http://www.StartingSite.com");
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curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
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$result=curl_exec ($ch);
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curl_close ($ch);
#

#
// Search The Results From The Starting Site
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if( $result )
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{
#
preg_match_all( ‘/<a href="(http:\/\/[^0-9].+?)"/’, $result, $output, PREG_SET_ORDER );
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foreach( $output as $item )
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{
#

#
// Write URLs It Found To The Database
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$db=mysql_connect ("localhost", "USERNAME", "PASSWORD") or die
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(‘I cannot connect to the database because: ‘ . mysql_error());
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mysql_select_db ("DB_NAME", $db);
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$table = "urls";
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$sqlquery = "INSERT INTO $table
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VALUES(’$id’,'$item[1]’)";
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$results = mysql_query($sqlquery);
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#
// Spider The New URLs For More URLs
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$db=mysql_connect ("localhost", "USERNAME", "PASSWORD") or die
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(‘I cannot connect to the database because: ‘ . mysql_error());
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mysql_select_db ("DB_NAME", $db);
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$spider = mysql_query("SELECT * FROM $table");
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while($row = mysql_fetch_array( $spider )) {
#

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foreach( $row as $spurl){
#

#
$ch = curl_init();
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curl_setopt($ch, CURLOPT_URL,"$spurl");
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curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
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$result2=curl_exec ($ch);
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curl_close ($ch);
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if( $result2 )
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{
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preg_match_all( ‘/"(http:\/\/[^0-9].+?)"/’, $result2, $output2, PREG_SET_ORDER );
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foreach( $output2 as $item2 ){
#

#
// Write All New URLs Found Into The Database
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$db=mysql_connect ("localhost", "USERNAME", "PASSWORD") or die
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(‘I cannot connect to the database because: ‘ . mysql_error());
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mysql_select_db ("DB_NAME", $db);
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$table = "urls";
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$sqlquery = "INSERT INTO $table
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VALUES(’$id’,'$item2[1]’)";
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$results = mysql_query($sqlquery);
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$see = mysql_query("SELECT urls FROM $table");
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while($row2 = mysql_fetch_array( $see )) {
#

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echo $row2["urls"];
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echo ("<br />");
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}}}}}}}
#

#
?>

I want to edit this code to crawl URL's I specified in a Database. How would i do that?