In my web application, I create a formula which uses a textarea to take a list of IDs (in hex). The user have to separate them by pressing return after entering every ID.
<label class="col-md-3 control-label" for="id_list">IDs: </label>
<div class="col-md-9>
<textarea class="form-control" id="id_list" name="id_list" required></textarea>
</div>
Then, I send this list to the server for processing (in PHP):
$id_list = trim($_POST['id_list'];
$id_array = explode(PHP_EOL, $id_list);
// file_put_contents('/tmp/bla.txt', $id_array);
for($i = 0; $i < count($id_array); $i++){
// Do stuff
}
// Now I want to save the ids in a string which will separate the ids with ","
$id_string = str_replace(PHP_EOL, ',', $id_list)
This works fine on a Windows server. However, on a Linux server it seems to have problem with PHP_EOL; when I put the result from explode(PHP_EOL, $id_list) in a txt file and examine it in Notepad++, the CR is still there.
I tried different ways'\n','\r\n',..., but it seems using PHP_EOL is the only way where explode(PHP_EOL, $id_list) works in Windows.
What can I do to make it working on both Windows AND Linux?
$id_list = trim($_POST['id_list']);
$id_array = explode("\n", $id_list);
$id_array = array_filter($id_array, 'trim');
foreach ($id_array as $line) {
// do stuff here
}
This should work, you explode on "\n" and trim any left over "\r" (if any).
I suggest you to use preg_split, therefore a regex:
$id_array = preg_split('#[\s,]+#Sui', $id_list);
So you have an array of ID, whatever the input format is. You can check the manual entry for this function in preg_split (php.net).
I actually (almost) had the right answer. \r\n works on both systems, but I just made the mistake putting them in '' (single quotes) when "" (double quotes) should be used here:
explode("\r\n", $id_list)
str_replace("\r\n", ',', $id_list)
It is both working on Windows and Linux now.