如何将换行符转换为\n

Question

我有一个db的返回字符串.

返回字符串必须以javascript格式化.

<?php
    $db = "this is a line
           this is a new line";
?>

我如何将上述内容转换为:

<?php $db = "this is a line \n this is a new line"; ?>

使用Javascript:

<script>
    var jdb = <?php echo $db; ?>
</script>

Answer 1

试试这个(更新2014-11-08):

<?php

   $db = "this is a line
          this is a new line
          ";

?>
<script type="text/javascript">
  var jdb = <?php echo json_encode($db) ?>;
</script>

Answer 2

$db = preg_replace("/\n/m", '\n', $db);

应该做的伎俩

Answer 3

要正确保留换行符\r和\n换行符，您可以轻松使用strtr。

$db = strtr( $db, array(  "\n" => "\\n",  "\r" => "\\r"  ));