While parsing xml/json, skip page if error message received - php

Question

I have following issue. I am parsing an xml feed with multiple pages and there is no way to understand how many they are (I have a variavle set in the xml url, so for each variable there are random number of pages). All I know is that the number can not exceed 50. Now I have a script that autoincrement the variable for the page number starting at 1 and up to 50.
Let's say, that the link has total of 26 pages. With my script I will continue to send requests until the scripts gets to page 50. Than it changes the first variable and starts again from 1 to 50. For the first link, from page 27 forward the xml will return followwing:
<response>
<status>error</status>
<code>400</code>
<message>Incorrect Request Headers</message>
</response>
How can I make so when the scipt receive this message, to stop the autoincrement and continue by changing the first variable and start again at 1? The code now is:
$query = "SELECT * FROM table_name ORDER BY id ASC";
$result = mysql_query($query) or die(mysql_error());
while ($row = mysql_fetch_array($result)) {
if($row['row_name'] == '') {
$variable1 = 0;
}
else {
$variable1 = $row['row_name'];
}
$page = 0;
do {
$page++;
$result = apiCall('option1', 'option2', array('option3' => $variable1, 'page' => $page));
usleep(1000);
$res = json_decode($result);
foreach ($res->node1->node2 as $item) {
//define variable for insertion in MySQL
$sql1 to insert the variables
if (!mysql_query($sql1,$con1))
{
die('Error: ' . mysql_error());
}
}
}
while ($page<=50);
}
In the above code, only the $variable1 and $page are variables. All options (1, 2 and 3) are predefined and stay the same. I.e. I need when the script gets the error message to start again from 1 with next value of $variable1.

Answer 1

OK. Here is the code I played around:
$query = "SELECT * FROM table_name ORDER BY id ASC";
$result = mysql_query($query) or die(mysql_error());
while ($row = mysql_fetch_array($result)) {
if($row['row_name'] == '') {
$variable1 = 0;
}
else {
$variable1 = $row['row_name'];
}
$page = 1;
do {
$result = apiCall('option1', 'option2', array('option3' => $variable1, 'page' => $page));
usleep(1000);
$res = json_decode($result);
if ($res->status == 'error') {
break 2;
}
foreach ($res->node1->node2 as $item) {
//define variable for insertion in MySQL
$sql1 to insert the variables
if (!mysql_query($sql1,$con1))
{
die('Error: ' . mysql_error());
}
}
$page++;
}
while (0);
}
The problem is that it stops the script execution at some point. Can not understand why.