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Re: define ('NL', "<br />"); can I define a constant var ?

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Am 22.01.2013 19:43, schrieb Luuk:

> On 22-01-2013 09:39, Arno Welzel wrote:
>> cate, 2013-01-22 01:06:
>>
>>> I can see why this doesn't work:
>>>
>>>     define ('NL', '<br />');
>>>     echo "This is NL another line";
>>>
>>> Is there a way to define a constant variable in PHP?
>>
>> Maybe you want to look at the documentation:
>>
>> <http://php.net/manual/en/language.constants.php>
>>
>> So - yes the define is OK.
>>
>> But your echo will not work, since NL is not automatically treated as a
>> placeholder. You have to write:
>>
>> echo "This is ".NL." another line";
>>
>> With variables this would be easier though:
>>
>> $NL = '<br />';
>> echo "This is $NL another line";
>>
>
> Why do you use single quotes on the first line,
> and double on the second?

To avoid substitutions and to make clear, that the string is a literal.

> Why not simply use double-quotes everywhere.....

Because then $foobar would be treated as a variable or /n would be 
treated as newline and not as literal '/n'.


-- 
Arno Welzel
http://arnowelzel.de
http://de-rec-fahrrad.de

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define ('NL', "<br />");  can I define a constant var ? cate <catebekensail@yahoo.com> - 2013-01-21 16:06 -0800
  Re: define ('NL', "<br />");  can I define a constant var ? Adam Harvey <usenet@adamharvey.name> - 2013-01-22 00:44 +0000
    Re: define ('NL', "<br />");  can I define a constant var ? BobMCT <r.mariotti@fdcx.net> - 2013-01-21 21:16 -0500
      Re: define ('NL', "<br />");  can I define a constant var ? Kim André Akerø <kimandre@nospambetadome.com> - 2013-01-22 03:50 +0100
  Re: define ('NL', "<br />");  can I define a constant var ? denisb <newdb@no-log.org> - 2013-01-22 08:17 +0100
  Re: define ('NL', "<br />");  can I define a constant var ? Arno Welzel <usenet@arnowelzel.de> - 2013-01-22 09:39 +0100
    Re: define ('NL', "<br />");  can I define a constant var ? Luuk <luuk@invalid.lan> - 2013-01-22 19:43 +0100
      Re: define ('NL', "<br />");  can I define a constant var ? Tim Streater <timstreater@greenbee.net> - 2013-01-22 18:58 +0000
        Re: define ('NL', "<br />");  can I define a constant var ? Luuk <luuk@invalid.lan> - 2013-01-22 20:08 +0100
          Re: define ('NL', "<br />");  can I define a constant var ? "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2013-01-23 01:35 +0100
          Re: define ('NL', "<br />");  can I define a constant var ? Arno Welzel <usenet@arnowelzel.de> - 2013-01-23 10:59 +0100
        Re: define ('NL', "<br />");  can I define a constant var ? The Natural Philosopher <tnp@invalid.invalid> - 2013-01-22 19:40 +0000
      Re: define ('NL', "<br />");  can I define a constant var ? Arno Welzel <usenet@arnowelzel.de> - 2013-01-23 10:55 +0100
    Re: define ('NL', "<br />");  can I define a constant var ? Jørn Andersen <jorn@jorna.dk> - 2013-01-22 23:51 +0100
      Re: define ('NL', "<br />");  can I define a constant var ? Shake <alex.estevezQUENO@QUENOfilnet.es> - 2013-01-23 00:08 +0100
        Re: define ('NL', "<br />");  can I define a constant var ? Jørn Andersen <jorn@jorna.dk> - 2013-01-23 00:51 +0100
          Re: define ('NL', "<br />");  can I define a constant var ? "Peter H. Coffin" <hellsop@ninehells.com> - 2013-01-22 19:03 -0600
          Re: define ('NL', "<br />");  can I define a constant var ? Shake <alex.estevezQUENO@QUENOfilnet.es> - 2013-01-23 03:42 +0100
      Re: define ('NL', "<br />");  can I define a constant var ? Jerry Stuckle <jstucklex@attglobal.net> - 2013-01-22 19:50 -0500

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