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'])));

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'])));

explode("\n", $str);

"(而不是')非常重要，否则换行符不会被解释。

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)

你可以使用爆炸函数，使用“\n”作为分隔符:

$your_array = explode("\n", $your_string_from_db);

例如，如果你有这样一段代码:

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

你会得到这样的输出:

array
  0 => string 'My text1' (length=8)
  1 => string 'My text2' (length=8)
  2 => string 'My text3' (length=8)

注意，必须使用双引号字符串，因此\n实际上被解释为换行符。 (详情请参阅手册页。)

我在PHP文档中找到了这个:

<?php
  // Split the phrase by any number of commas or space characters,
  // which include " ", \r, \t, \n and \f

  $keywords = preg_split("/[\s,]+/", "hypertext language, programming");
  print_r($keywords);
?>