Explode PHP string by new line

Question

Best Practice

As mentioned in the comment to the first answer, the best practice is to use the PHP constant PHP_EOL which represents the current system's EOL (End Of Line).

$skuList = explode(PHP_EOL, $_POST['skuList']);

PHP provides a lot of other very useful constants that you can use to make your code system independent, see this link to find useful and system independent directory constants.

Warning

These constants make your page system independent, but you might run into problems when moving from one system to another when you use the constants with data stored on another system. The new system's constants might be different from the previous system's and the stored data might not work anymore. So completely parse your data before storing it to remove any system dependent parts.

UPDATE

Andreas' comment made me realize that the 'Best Practice' solution I present here does not apply to the described use-case: the server's EOL (PHP) does not have anything to do with the EOL the browser (any OS) is using, but that (the browser) is where the string is coming from.

So please use the solution from @Alin_Purcaru (three down) to cover all your bases (and upvote his answer):

$skuList = preg_split('/\r\n|\r|\n/', $_POST['skuList']);

Cover all cases. Don't rely that your input is coming from a Windows environment.

$skuList = preg_split("/\\r\\n|\\r|\\n/", $_POST['skuList']);

or

$skuList = preg_split('/\r\n|\r|\n/', $_POST['skuList']);

Try "\n\r" (double quotes) or just "\n".

If you're not sure which type of EOL you have, run a str_replace before your explode, replacing "\n\r" with "\n".

Lots of things here:

• You need to use double quotes, not single quotes, otherwise the escaped characters won't be escaped.
• The normal sequence is \r\n, not \n\r.
• Depending on the source, you may just be getting \n without the \r (or even in unusual cases, possibly just the \r)

Given the last point, you may find preg_split() using all the possible variants will give you a more reliable way of splitting the data than explode(). But alternatively you could use explode() with just \n, and then use trim() to remove any \r characters that are left hanging around.

this php function explode string by newline

Attention : new line in Windows is \r\n and in Linux and Unix is \n
this function change all new lines to linux mode then split it.
pay attention that empty lines will be ignored

function splitNewLine($text) {
    $code=preg_replace('/\n$/','',preg_replace('/^\n/','',preg_replace('/[\r\n]+/',"\n",$text)));
    return explode("\n",$code);
}

example

$a="\r\n\r\n\n\n\r\rsalam\r\nman khobam\rto chi\n\rche khabar\n\r\n\n\r\r\n\nbashe baba raftam\r\n\r\n\r\n\r\n";
print_r( splitNewLine($a) );

output

Array
(
    [0] => salam
    [1] => man khobam
    [2] => to chi
    [3] => che khabar
    [4] => bashe baba raftam
)