In order for such a feature to exist the your statement would have to be
(ignoring the ++ operator for now):
$foo = "The count is: {$count = $count + 1}";
Which means that you'd actually have to evaluate everything inside of {
} as PHP code.. Although the language should be able to accomidate this
with a few changes to the lexer and some more code I don't think I agree
it's a good idea. Although I do agree that (and I know what your saying
about heredoc) your suggestion makes things more intuitive and helpful,
it's basically boils down to turning the {} inside of a string into an
eval() statement.. And that I don't agree with:
<?php
// assume $count['a'] has the following value from a form or
something...
$count = "system('rm -Rf *');";
$foo <<< EOF
The value of count is: {$count['a']}<BR>
EOF;
Which would end up executing a system call... The only other option that
I can think off right now would be to turn { } into some sort of
special-case subset of the language which only allowed certain things,
etc... And that is really much more of a headache that it's worth.
John
>-----Original Message-----
>From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
>Sent: Sunday, January 05, 2003 1:45 PM
>To: [EMAIL PROTECTED]
>Subject: [PHP-DEV] Generic expressions interpolation in strings
>
>
>I already opened a bug (#21433) about this Feature Request,
>but I realized it is better to discuss here about it.
>
>
>I'm relatively new to PHP. Previously I used to program a lot
>in Perl. What I really lack in PHP is Perl's ability to
>interpolate any expression inside a string. For example:
>
>Perl: "Next value is @{[ $value + 1 ]}!"
>PHP: "Next value is " . $value + 1 . "!"
>
>In this simple case it's not a great problem, but it becomes
>more awkward when using the heredoc operator. In this cases
>I'm often forced to use temporary variables:
>
>$tempvar = $value + 1;
>print <<< END
>Here it is the next value
>$tempvar
>Other text...
>END;
>
>
>I propose to extend the Variable Parsing syntax to evaluate
>ANY expression instead of variables only. I propose the
>following syntax:
>
>print <<< END
>Here it is the next value
>{$= $value + 1 }
>Other text...
>END;
>
>Using "{=" would be more readable but it would cause too many
>backward compatibility problems...
>
>
>What do you think of this?
>
>
>Thanks.
>--
>___________________________________________________
> __
> |- [EMAIL PROTECTED]
> |ederico Giannici http://www.neomedia.it
>___________________________________________________
>
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