Use:

$str = "My text1\nMy text2\nMy text3";
$arr = explode("\n", $str);

foreach ($arr as $line_num => $line) {
    echo "Line #<b>{$line_num}</b>: " . htmlspecialchars($line) . "<br />\n";
}

真正的数组:

$str = "My text1\nMy text2\nMy text3";
$arr = explode("\n", $str);

$array = array();

foreach ($arr as $line) { // loop line by line and convert into array
    $array[] = $line;
};

print_r($array); // display all value

echo $array[1]; // display index 1

嵌入在线:

正文，html, iframe { 宽度:100%; 高度:100%; 溢出:隐藏; ｝ <iframe src="https://ideone.com/vE1gst" ></iframe>

您可以执行$string = nl2br($string)，以便将换行符更改为

<br />. 

这样，系统使用\r\n或\n或\r就无关紧要了

然后你可以把它输入一个数组:

$array = explode("<br />", $string);

大卫有一个伟大的方向，但它错过了\r。这招对我很管用:

$array = preg_split("/(\r\n|\n|\r)/", $string);

我一直都很成功地使用这个方法:

$array = preg_split("/\r\n|\n|\r/", $string);

(更新为最后的\r，谢谢@LobsterMan)

只使用'base'包也是简单情况下的解决方案:

> s <- "a\nb\rc\r\nd"
> l <- strsplit(s,"\r\n|\n|\r")
> l  # the whole list...
[[1]]
[1] "a" "b" "c" "d"
> l[[1]][1] # ... or individual elements
[1] "a"
> l[[1]][2]
[1] "b"
> fun <- function(x) c('Line content:', x) # handle as you wish
> lapply(unlist(l), fun)

这个方法对我来说总是有效的:

$uniquepattern = "gd$#%@&~#" // Any set of characters which you don’t expect to be present in user input $_POST['text']. Better use at least 32 characters.
$textarray = explode($uniquepattern, str_replace("\r", "", str_replace("\n", $uniquepattern, $_POST['text'])));