php echo alert message with new line '\n' not working

Question

I have a message that I would like to show by using alert()

$message = "No result found for the following info:Name: ".$FullName."IC: ".$ID." in database.";
echo "<script>alert('".$message."'); window.history.back();</script>";

This is working but if I add a new line '\n' into the message

$message = "No result found for the following info:\nName: ".$FullName."\nIC: ".$ID." in database.";

it will not show out the pop out message. What is the problem?

look at the page source what is the html output on those lines? do you have a live link? — Aryeh Armon, Apr 23 '15 at 08:21
This might be helpful: http://stackoverflow.com/questions/1841452/new-line-in-javascript-alert-box — Max Schindler, Apr 23 '15 at 08:23

yergo · Accepted Answer · 2015-04-23T08:40:06.990

5

Edit it to not change to newline in PHP, instead in javascript:

'No result found for the following info:\nName: '.$FullName.'\nIC: '.$ID.' in database.'
^                                               ^           ^      ^     ^             ^

OR by adding extra backslash: "\\n".

According to Panther, also truth: use 'alert("' . $message . '")'.

edited Apr 23 '15 at 08:40

answered Apr 23 '15 at 08:22

yergo

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score 4 · Answer 2 · answered Apr 23 '15 at 08:44

4

Or use PHP_EOL

 $msg = 'Hello' . PHP_EOL . 'Next line';

answered Apr 23 '15 at 08:44

Tom

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nice and great answer – Majid Hojati Jan 10 '17 at 20:25

score 3 · Answer 3 · answered Apr 23 '15 at 08:21

3

Add another \ backslash on your newlines:

$message = "No result found for the following info:\\nName: ".$FullName."\\nIC: ".$ID." in database.";

Output

answered Apr 23 '15 at 08:21

Kevin

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pavel · Answer 4 · 2015-04-23T08:31:11.480

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\n etc. aren't interpreted in single quotes, just in double quotes.

echo "<script>alert(\"" . $message . "\"); window.history.back();</script>";

OR

echo '<script>alert("' . $message . '"); window.history.back();</script>';

edited Apr 23 '15 at 08:31

answered Apr 23 '15 at 08:22

pavel

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This will not affect the content in `$message` – Gerald Schneider Apr 23 '15 at 08:52
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@GeraldSchneider: when you downvote something, you should be sure it isn't the solution. Did you try it before you downvoted? Of course it works, that's how JS interprete escaped chars like `\n, \r, \t`, etc. – pavel Apr 23 '15 at 10:21
As a matter of fact I did try it. Your suggestion would work if you applied it to the definition of `$message`, as yergo did in his answer. But this way `$message` is echoed verbally, including the newlines which break the javascript code. – Gerald Schneider Apr 23 '15 at 11:32
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@GeraldSchneider: if in HTML, which is generated from PHP, will be `alert("whatever \n content...")`, in alert will be two lines. Doens't matter if text in alert comes from PHP or not. – pavel Apr 23 '15 at 11:34

score 0 · Answer 5 · edited Jan 12 '20 at 14:44

0

You need to use Line feed + Newline

\r\n

and that will work as shown in the following script:

echo "If you view the source of output frame \r\n you will find a newline in this string.";
echo nl2br("You will find the \n newlines in this string \r\n on the browser window.");

edited Jan 12 '20 at 14:44

Michael Haephrati

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answered Jan 12 '20 at 13:11

Amr Angry

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php echo alert message with new line '\n' not working

5 Answers5