how can i remove "\n" in string in php?

Question

how to remove "\n" in string?
I used 3 method bellow ,seams that only the "\s+" works , but I only want to remove \n,not all space ,how to do the job?
need help, this question had puzzled me for a long time.

$str="<p>
    hello<br>
    world
</p>";

//$str=str_replace("\n","",$str);
$str=preg_replace("@\n@","",$str);
//$str=preg_replace("@\s+@"," ",$str);  
echo $str;

try with [nl2br()](http://php.net/manual/en/function.nl2br.php) — diEcho, May 10 '13 at 07:18

score 35 · Accepted Answer · answered May 10 '13 at 07:25

35

This should also do the trick.

$str=str_replace("\r\n","",$str);

answered May 10 '13 at 07:25

Serhiy

2,437
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1

good，this is what I want ,thank you – mingfish_004 May 10 '13 at 07:28
1

This is the correct answer – Erich García Dec 11 '17 at 21:41
2

Notice if is a linux/unix system it should be str_replace("\n","",$str); – D.Snap Oct 08 '19 at 15:14
$str=str_replace("\r","",str_replace("\n","",$str)); – Cyril Jacquart Dec 13 '21 at 09:13

score 20 · Answer 2 · edited Nov 02 '17 at 11:13

20

$string = trim(preg_replace('/\s\s+/', ' ', $string));

The above code will replace multiple spaces and newlines with a single space.

edited Nov 02 '17 at 11:13

Gunaseelan

2,323
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answered Aug 08 '14 at 13:38

Hosam Elzagh

1,032
14
25

1

This one worked for me when I was trying to strip new lines in an HTML string. Thanks! – cbloss793 Jan 03 '20 at 23:40
Beautiful! Thanks a lot. – kray Dec 07 '20 at 02:41

how can i remove "\n" in string in php?

2 Answers2