how to delete rows from mysql database not found in xml file - php

Question

I have an xml file and now it's been inserted to MySQL database, but there was a problem in the xml file which meant some data may be deleted from the site, so I updated the xml file and I wrote code for deleting data from database table which deleted from xml but the records are still in the database.
from another way I want to compare between xml file and database and delete data not found.
<?php
ini_set('display_errors','On');
//connecting to database.
echo "connected to DB<br /><br />";
$url = "test.xml";
$xmlfgc = file_get_contents($url);
$xmlitem = new SimpleXMLElement($xmlfgc);
echo "xml loaded<br /><br />";
foreach ($xmlitem->property as $xml) {
//$id = mysql_real_escape_string($xml->id);
$mls_id = mysql_real_escape_string($xml->ref);
//echo "$mls_id";
echo "xml parsed<br /><br />";
$result = mysql_query("SELECT mls_id FROM ezrealty");
//$select = "SELECT mls_id FROM ezrealty";
//$storeArray = Array();
//while ($row = mysql_fetch_array($result, MYSQL_ASSOC)) {
// $storeArray[] = $row['mls_id'];
//}
if ($result != $mls_id){
$query = "DELETE FROM ezrealty WHERE mls_id = '$mls_id'";
mysql_query($query) or die(mysql_error());
echo "DataBase deleted<br /><br />";
}else{
echo "There is no deleted properties from xml file.";
}
}
//show updated records
echo "<br /><br />";
printf ("Records updated: %d\n", mysql_affected_rows());
//close connection
mysql_close($con2);
?>

Answer 1

thanks for you, now i have the solution for my problem.
<?php
ini_set('display_errors','On');
//connecting to database.
echo "connected to DB<br /><br />";
$url = "test.xml";
$xmlfgc = file_get_contents($url);
$xmlitem = new SimpleXMLElement($xmlfgc);
echo "xml loaded<br /><br />";
$xmldata = array();
foreach ($xmlitem->property as $xml) {
$mls_id = mysql_real_escape_string($xml->ref);
// $xmldata[] = "$mls_id";
$xmldata[] = '("' . $mls_id. '")';
}
//Get all reference numbers from database in array
$result = mysql_query("SELECT mls_id FROM gitfd_ezrealty");
$storeArray = Array();
while ($row = mysql_fetch_array($result, MYSQL_ASSOC)) {
$storeArray[] = $row['mls_id'];
}
//get difference between two arrays.
$result1 = array_diff($xmldata, $storeArray);
foreach ($result1 as $value) {
//echo "<strong>$value</strong> <br />";
//$value1 = '("' . $value. '")';
//$query = 'INSERT INTO gitfd_ezrealty (mls_id)
//VALUES' . implode(',', $value1);
//mysql_query($query) or die(mysql_error());
//echo "inserted into mysql<br /><br />";
}
echo "These properties are founded in target site and Not founded in our site.<br />";
echo "________________________________________________________________"."<br />";
print_r($result1);
echo "<br />"."_____________________________________________________________________"."<br />";
$result2 = array_diff($storeArray, $xmldata);
foreach ($result2 as $value) {
//echo "<strong>$value</strong> <br />";
$query = "DELETE FROM ezrealty WHERE mls_id = '$value'";
mysql_query($query) or die(mysql_error());
echo "DataBase deleted<br /><br />";
}
echo "_________________________________________________________________"."<br />";
print_r($result2);
echo "<br />"."______________________________________________________________________"."<br />";
echo "These properties were deleted .<br />";
//show updated records
echo "<br /><br />";
printf ("Records updated: %d\n", mysql_affected_rows());
//close connection
mysql_close($con2);
?>