explode

[drcolby]

I have a .txt file looking like this

3
4
56
23
59
10

i want PHP to open that file and store the numbers in an array

something like this

$q = "3,4,56,59,10"

Now i want to read $q and see if it contains 56 and 10
(it does)

so i want to delete those numbers and save the .txt file looking like this

3
4
23
59

thanks

[bpat1434]

$input = 'path/to/text/file.txt';
$search = array('10','56'); // Numbers you're looking for

$contents = file_get_contents($input);

$tmpary = explode("\n", $contents);
$keys = array();
foreach($search AS $num)
{
  if(false !=== ($key = array_search($num, $tmpary)))
    $keys[] = $key;
}
$new = array();
for(i=0; i<count($tmpary); i++)
{
  if(!in_array($i, $keys))
    $new[] = $tmpary[$i];
}

$string = implode("\n", $new);

// now just write $string to the text file ($input)

Hope that helps.

[NogDog]

I might do this:

$numbers = file("text_file.txt"); // reads each line into array element
foreach($numbers as $key => $val)
{
  $val = trim($val);
  if($val === "" or $val == 10 or $val == 56)
  {
    unset($numbers[$key]);
  }
}
$output = implode('', $numbers); // file() retains newlines, so don't need to add them
// now write $output to the file

[laserlight]

Here is another way of doing it:

function removeFromFile($value) {
    static $entries = array(10, 56); // elements to delete
    return !in_array(rtrim($value), $entries);
}

$numbers = file("text_file.txt"); // reads each line into array element
// file() retains newlines, so don't need to add them
$output = implode('', array_filter($numbers, 'removeFromFile'));
// now write $output to the file