Newline

[infernon]

Hello Everyone,

I am running PHP for Apache on a Windows XP machine.

When I attempt to use \n in my code to generate a newline, it does not
work. I've also see the other posts about using \r along with \n, but
that doesn't work either. I'm sort of stuck here. Is there anything
that I can do to generate a newline?

[Carl Vondrick]

Re: Newline

infernon wrote:[color=blue]
> When I attempt to use \n in my code to generate a newline, it does not
> work. I've also see the other posts about using \r along with \n, but
> that doesn't work either. I'm sort of stuck here. Is there anything
> that I can do to generate a newline?[/color]

My bet is that you are doing this:

echo 'Test\n';

The problem here is the single quotes. The single quotes tell the parser to
just spit out this string, and ignore any modifiers or variables.

So, try this:

echo 'Test'."\n";


Good luck,
Carl

--
Carl Vondrick
Web-Engineer

https://www.carlsoft.net

[infernon]

Re: Newline

Thanks for the quick response, Carl.

I'm actually using double-quotes. The exact code is:


printf("%1d %9s at \$%.2f each: \$%.2f\r\n"...


What I've found is that the source actually contains a carriage return,
but that the page doesn't render with one. I've tried this with both
IE and FF to be sure that it wasn't a browser problem. The other side
of it is that the command line puts the carriage return in as well.

I apologize, I should have posted more information in my initial post.
Thanks for your response.

[Carl Vondrick]

Re: Newline

infernon wrote:[color=blue]
> What I've found is that the source actually contains a carriage return,
> but that the page doesn't render with one. I've tried this with both
> IE and FF to be sure that it wasn't a browser problem. The other side
> of it is that the command line puts the carriage return in as well.[/color]

Ah! Your problem is with the HTML output, then, rather than PHP. HTML
ignores white space. If you want to put a line return, you must put a
break in: <br /> or <br> depending on the markup you are using (XHTML OR
HTML).

Alternatively, you can wrap your code in <pre> tags, which will print
everything exactly as it is.

Carl

--
Carl Vondrick
Web-Engineer

https://www.carlsoft.net

[Jerry Stuckle]

Re: Newline

infernon wrote:[color=blue]
> Hello Everyone,
>
> I am running PHP for Apache on a Windows XP machine.
>
> When I attempt to use \n in my code to generate a newline, it does not
> work. I've also see the other posts about using \r along with \n, but
> that doesn't work either. I'm sort of stuck here. Is there anything
> that I can do to generate a newline?
>[/color]

Look at your source - you'll see the newlines in there. But HTML ignores
newline characters. You need to use an html <br>.

--
=============== ===
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attgl obal.net
=============== ===

[infernon]

Re: Newline

OK, so I put the following line in and it worked:

print "</br>";

Is this correct practice?

[Carl Vondrick]

Re: Newline

infernon wrote:[color=blue]
> print "</br>";
>
> Is this correct practice?[/color]
No, it needs to be either <br> or <br /> depending on what markup language
you are using (HTML uses <br> and XHTML uses <br />).

On the PHP side, the following is a little bit faster:

echo '<br />';

--
Carl Vondrick
Web-Engineer

https://www.carlsoft.net

[infernon]

Re: Newline

Thank you, Carl. This was a big help!

[Jerry Stuckle]

Re: Newline

infernon wrote:[color=blue]
> OK, so I put the following line in and it worked:
>
> print "</br>";
>
> Is this correct practice?
>[/color]

Yep. Or, if your source is a string containing nl characters, use nl2br().

--
=============== ===
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attgl obal.net
=============== ===

[Jerry Stuckle]

Re: Newline

Carl Vondrick wrote:[color=blue]
> infernon wrote:
>[color=green]
>>print "</br>";
>>
>>Is this correct practice?[/color]
>
> No, it needs to be either <br> or <br /> depending on what markup language
> you are using (HTML uses <br> and XHTML uses <br />).
>
> On the PHP side, the following is a little bit faster:
>
> echo '<br />';
>[/color]

But <br /> is invalid html 4.x, although browsers will generally process it OK.
It's only valid for xml or xhtml.

--
=============== ===
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attgl obal.net
=============== ===

[Carl Vondrick]

Re: Newline

Jerry Stuckle wrote:[color=blue]
> But <br /> is invalid html 4.x, although browsers will generally process
> it OK. It's only valid for xml or xhtml.[/color]
Yes, as I said above. :-)

--
Carl Vondrick
Web-Engineer

https://www.carlsoft.net

[Andy Jeffries]

Re: Newline

On Thu, 13 Apr 2006 17:39:50 +0000, Carl Vondrick wrote:[color=blue][color=green]
>> print "</br>";
>>[/color]
> On the PHP side, the following is a little bit faster:
>
> echo '<br />';[/color]

While I don't dispute using echo instead of print and ' instead of " is
faster, has anyone actually done any benchmarks to see how much faster.

To be honest, I tend to use print (because I'm used to it) and "" (as I
generally would go back and add variables in later and may forget to
change the ' to ").

It's the same reason that in various coding standards it's recommended to
use {} even for single line ifs, so when the coder returns (or another one
edits the file) they're less likely to add a second indented line and not
see that the statement isn't wrapped in braces.

It's also faster to write functions inline, but at the expense of
readability/ease of maintenance. Not that we're comparing apples to
apples with that latter analogy (I know there's not much readability
difference in echo '' and print "").

Anyway, my point was - undeniably faster, but how much so... Anyone got
numbers?

Cheers,


Andy


--
Andy Jeffries MBCS CITP ZCE | gPHPEdit Lead Developer
http://www.gphpedit.org | PHP editor for Gnome 2
http://www.andyjeffries.co.uk | Personal site and photos

[Default User]

Re: Newline

Jerry Stuckle wrote:
[color=blue]
> infernon wrote:[/color]
[color=blue][color=green]
> > When I attempt to use \n in my code to generate a newline, it does
> > not work. I've also see the other posts about using \r along with
> > \n, but that doesn't work either. I'm sort of stuck here. Is
> > there anything that I can do to generate a newline?
> >[/color]
>
> Look at your source - you'll see the newlines in there. But HTML
> ignores newline characters. You need to use an html <br>.[/color]

It doesn't ignore it, rather treats it as whitespace.



Brian

[Carl Vondrick]

Re: Newline

Andy Jeffries wrote:[color=blue]
> Anyway, my point was - undeniably faster, but how much so...  Anyone got
> numbers?[/color]
In large numbers, it is significant. Ran under Kubuntu Linux with PHP 5.1.2
with 1GB RAM and 3.2Ghz processor:

Output:
S Diff: 11.428... (single quotes)
D Diff: 19.623... (double quotes)

Script:
<?php
$s_start = microtime(true) ;

for ($x = 0; $x < 99999; $x++)
{
echo 'Hello. How are you?<br />';
}

$s_end = microtime(true) ;

$d_start = microtime(true) ;

for ($x = 0; $x < 99999; $x++)
{
echo "Hello. How are you?<br />";
}

$d_end = microtime(true) ;

echo 'S Diff: ' . ($s_end - $s_start) . '<br />';
echo 'D Diff: ' . ($d_end - $d_start) . '<br />';
?>


So, single quotes wins hands down. To compare echo vs print:

Output:
E Diff: 12.626... (echo)
P Diff: 15.637... (print)

<?php
$e_start = microtime(true) ;

for ($x = 0; $x < 99999; $x++)
{
echo 'Hello. How are you?<br />';
}

$e_end = microtime(true) ;

$p_start = microtime(true) ;

for ($x = 0; $x < 99999; $x++)
{
print 'Hello. How are you?<br />';
}

$p_end = microtime(true) ;

echo 'E Diff: ' . ($e_end - $e_start) . '<br />';
echo 'P Diff: ' . ($p_end - $p_start) . '<br />';
?>

The fastest is echo with single quotes.

--
Carl Vondrick
Web-Engineer

https://www.carlsoft.net

[Mladen Gogala]

Re: Newline

On Thu, 13 Apr 2006 10:22:12 -0700, infernon wrote:
[color=blue]
> Is this correct practice?[/color]

print "<br>";



--

http://www.mgogala.com