Modify Line n With PHP?

Question

I want to write on line 5 of my file.

I can't use replace because my file use many numbers in lines. So I need to know how can modify line 5.

You know we can read line 5 of file with:

$File='myfile.txt';

$readline = file($File);

$line5=$readline[4];'

I need to code that can modify only line 5 of $File.

Look [here](http://stackoverflow.com/questions/235604/overwrite-line-in-file-with-php) for how other people have done it. i would need to see a sample of what is stored in the file before answering — Justin Kyle Parton, Aug 06 '14 at 17:51
If you Increase your accuracy. You'll see that I only want to change line 5. — Amin Maleki, Aug 06 '14 at 18:12
thats not the point is this a file for storing values, flat-filedb, logging? — Justin Kyle Parton, Aug 06 '14 at 18:15
instead of creatively changing a certain line, make your file a key value file so that you can easily access all the information in a standardized way. done. — Justin Kyle Parton, Aug 06 '14 at 18:35

meda · Accepted Answer · 2014-08-06T18:34:51.623

2

In your code $read is undefined. It should be $readline, the following should work for you:

$File = 'myfile.txt';
$lines = file($File);
$lines[4] = 'modified line';
file_put_contents($File, implode("\r\n", $lines));

edited Aug 06 '14 at 18:34

answered Aug 06 '14 at 17:59

meda

Thanks. It's a writing mistake. – Amin Maleki Aug 06 '14 at 18:02
@AminMaleki ok see the rest – meda Aug 06 '14 at 18:03
In this code add line 6 at the end of line 5(edited line) so you need to "\r\n". Change $lines[4] = 'modified line'; with $lines[4] = 'modified line'."\r\n"; – Amin Maleki Aug 06 '14 at 18:28
@AminMaleki yes you right on windows it should be `\r\n` I adjusted thanks! – meda Aug 06 '14 at 18:35
@meda U could better use `PHP_EOL` for line endings :) – DarkBee Aug 17 '14 at 09:54

1 Answers1