Getting data from multiple pages using incremental page number value - php

Question

I have a script to get certain data from a page based on the content of a span ID
However there are 200+ pages of results to trawl through and it only displays 127 results on each page
The script I have does get data for the 127 elements that are on the first page however it wont then open the new page and continuing to get data
It just stops after the initial 127
Any help would be great
$end = 200;
$start = 1;
$stop = $start + 10;
$html = file_get_contents('http://example.com/res/'.$start);
$doc = new DOMDocument();
#$doc->loadHTML($html);
echo $stop;
$i = 0;
foreach($doc->getElementsByTagName('span') as $element ) { //Loops through all available span elements
if (!empty($element->attributes->getNamedItem('id')->value)) { // Discards irrelevant span elements based on their `ID`. A similar sorting is achieved with `empty()` as the target `span` doesn't have any associated `ID`.
echo "Record : ".$i.' '. $element->attributes->getNamedItem('id')->value."\n";
$i++;
$end = $start;
}
}
if($i == 127) {
$i = 0;
do {
$next = $start++;
$page = $next;
$html = file_get_contents('http://example.com/res/'.$page);
$doc = new DOMDocument();
#$doc->loadHTML($html);
foreach($doc->getElementsByTagName('span') as $element )
{
if (!empty($element->attributes->getNamedItem('id')->value))
{
echo "Record : ".$i.' '. $element->attributes->getNamedItem('id')->value."\n";
$i++;
$end = $start;
}
}
} while ($page != $stop);
//echo $i.' Records';
}

Answer 1

As stated in comments, since your last record displayed in the first loop is 127, the line after that echo increments $i from 127 to 128.
foreach($doc->getElementsByTagName('span') as $element ) { //Loops through all available span elements
if (!empty($element->attributes->getNamedItem('id')->value)) { // Discards irrelevant span elements based on their `ID`. A similar sorting is achieved with `empty()` as the target `span` doesn't have any associated `ID`.
echo "Record : ".$i.' '. $element->attributes->getNamedItem('id')->value."\n";
$i++; //At last iteration, $i = 128
$end = $start;
}
}
And then, if($i == 127) will be false.
I suggest you to change the condition to if($i >= 127)