How to show this text, in textarea, to have a newline format

How to display this text, in textarea, to have a newline format

 
  $val = "1234
Document (\ ' 5678\ ') ";
Echo ';
?>

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$val = " 1234Document (\ ' 5678\ ') ";
Isn't it a string above? Why don't you write this?
$val = ' 1234Document ("5678") ';
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$val = " 1234
Document (\ ' 5678\ ') ";

There's a BR ~ ~ ~ ~
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In short, it's

1234
Document (' 5678 ')

So a word, to be shown in the textarea, then I add escape, but, the error is mainly double quotation mark problem

.. Value= "\" \ ""

Escape single Quotes No problem, escape double quotes and outer double quote conflicts
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Citation:

$val = " 1234document (\ ' 5678\ ')";
Isn't it a string above? Why don't you write this?
$val = ' 1234document ("5678") ';

It's hard to be here, can't change

1234
Document (' 5678 ')

Output as-is in textarea, and cannot be manifested.

Just like you entered this paragraph in the Textrea, the less than is less than the number, single quotation marks are single quotes, double quotation marks are double quotes,

How do you do that??
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How to use JavaScript to

1234
Document (' 5678 ')

Output in textarea???

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