Merging numbered lists in PHP - php

Question

I have a set of items with numbers already assigned to them and am trying to fill in the gaps that the person before me left in the spreadsheet. I figured I could write a php script to do this for me yet it's placing the assigned numbers in weird spots.
Here's an example:
I have an associative array of numbers / names
[0] => 3502 "Scallops, Bay" [1] => 3503 "Oysters, Chesepeake" [2] => 3504 "Clams, Cherry Stone"
The script to order these is:
$d = file("list.txt");
$j=0;
for ($i=2000;$i<8000;$i++) { //I want the codes to begin at the 2000 and end at 8000
if (strpos($d[$j], $i) !== false) {
echo $d[$j]."<br/>";
$j++;
} else {
echo $i."<br/>";
}
}
But here's what I'm getting:
2000-2056 print out fine, because they don't match [0] of $d, but then on 2057 it prints
2056
3502 "Scallops, Bay"
3503 "Oysters, Chesepeake"
2059
2060
3504 "Clams, Chery Stone"
Then goes to print on until 2080 where it prints [3] of $d.
I'm really confused. I don't see 2057 anywhere in "3502 'Scallops, Bay'"
Should I be trying a different approach?

Answer 1

The second argument to strpos() can be an integer or a string; if it's an integer, it's ordinal value is used to search. From the manual:
If needle is not a string, it is converted to an integer and applied as the ordinal value of a character.
You should cast the index to a string first:
if (strpos($d[$j], "$i") !== false) {
Btw, it would be better to check whether the line starts with $i and whether $d[$j] is still a valid entry:
if (isset($d[$j]) && strpos($d[$j], "$i\t") === 0) {

Answer 2

It's because of the order. If the script reache lets say 5000 with index of 1, it won't find 3000 with index 2.
My solution:
$A = array('3000 abc street', '2000 something', '5000 somthing other');
function ScanFor($Number, &$A) //& is realy important
{
foreach($A as $I => $V)
if(strpos($Number, $V) === 0) // so it starts with it
{
unset($A[$I]); //We don't want it anymore
list(, $Name) = explode(' ', $V, 1); //After Number there is always space, so we split it to 2 parts
return $Name;
}
return '';
}
for($I = 2000; $I < 10000; $I++)
{
printf("%d", $I);
if($Name = ScanFor($I, $A))
{
printf("\t%s", $Name)
}
printf("<br>\n");
}

Answer 3

Try working with the file like csv and use SplMinHeap to sort
Example:
// Where to store Result
$store = new SortedValue();
// Read File
$fp = fopen("list.txt", "r");
// Read each file content
while(($data = fgetcsv($fp, 1000, " ")) !== FALSE) {
// Filter Empty space
$data = array_filter($data);
// Your Filter
if ($data[0] > 2000 && $data[0] < 8000) {
$store->insert($data);
}
}
// Print_r all result
print_r(iterator_to_array($store));
Class Used
class SortedValue extends SplMinHeap {
function compare($a, $b) {
return $b[0] - $a[0];
}
}