RE: [PHP] how call a variable in a text
This is always safe to use variables like this...
$text = This is . $variable;
Or
$text = This is . $variable[0];
Regards,
Samrat Kar
FRD, BARC
Tel: 022-25597295
Alternate Email: esam...@yahoo.com
-Original Message-
From: Kim Madsen [mailto:php@emax.dk]
Sent: Thursday, October 22, 2009 2:25 AM
To: a...@ashleysheridan.co.uk
Cc: David Murphy; php-general@lists.php.net
Subject: Re: [PHP] how call a variable in a text
Ashley Sheridan wrote on 2009-10-21 22:43:
The {} only become really useful when you're trying to reference arrays
within a string:
$var = array('great', 'boring');
$text = this is {$var[0]}.;
Without the curly braces, PHP wouldn't be able to figure out whether you
wanted the end string to be 'This is great.' or 'This is [0].' despite
the variable itself clearly being an array.
Ehh what? This has never been a problem for me:
$text = this is $var[0].;
However this does give an error (or notice, don't recall, haven't seen
the error in quite a while):
$text = this is $var['0'].;
In that case the solution is the curly brackets:
$text = this is {$var['0']}.;
--
Kind regards
Kim Emax - masterminds.dk
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Re: [PHP] how call a variable in a text
On Wed, 2009-10-21 at 23:11 +0200, Kim Madsen wrote:
Ashley Sheridan wrote on 2009-10-21 22:56:
Try this though:
?php
$var = array(array('great','alright'), 'boring');
print This is $var[0][0].;
Print This is different from your previous example :-);
--
Kind regards
Kim Emax - masterminds.dk
Yeah, I just forgot that PHP will correctly work with an array to a
depth of 1 inside of a string. Much like the above advice, I'd taken to
always using {} for arrays inside of strings, although not for strings
inside of strings unless I needed non-white-space text to immediately
follow said string. Would make more sense if I used the braces for
everything, but nobody has ever accused me of making too much sense
before!
Thanks,
Ash
http://www.ashleysheridan.co.uk
This will also work (shell like style):
print Test: ${var[0]};
but this won't based on the same principle you mention above:
print Test: ${var[0][0]};
--
Thodoris
Re: [PHP] how call a variable in a text
On Thu, 2009-10-22 at 09:53 +0300, Thodoris wrote:
On Wed, 2009-10-21 at 23:11 +0200, Kim Madsen wrote:
Ashley Sheridan wrote on 2009-10-21 22:56:
Try this though:
?php
$var = array(array('great','alright'), 'boring');
print This is $var[0][0].;
Print This is different from your previous example :-);
--
Kind regards
Kim Emax - masterminds.dk
Yeah, I just forgot that PHP will correctly work with an array to a
depth of 1 inside of a string. Much like the above advice, I'd taken to
always using {} for arrays inside of strings, although not for strings
inside of strings unless I needed non-white-space text to immediately
follow said string. Would make more sense if I used the braces for
everything, but nobody has ever accused me of making too much sense
before!
Thanks,
Ash
http://www.ashleysheridan.co.uk
This will also work (shell like style):
print Test: ${var[0]};
but this won't based on the same principle you mention above:
print Test: ${var[0][0]};
Erm, the braces are meant to go *around* the variable, not around a bit
of it:
print Test: {$var[0][0]};
Thanks,
Ash
http://www.ashleysheridan.co.uk
RE: [PHP] how call a variable in a text
Curly brackets are usually highlighted as well so it is a good practice,
generally speaking, to use them for double quoted strings and maintainability
increase automatically.
Regards
From: esam...@barc.gov.in
To: php-general@lists.php.net
Date: Thu, 22 Oct 2009 11:31:53 +0530
Subject: RE: [PHP] how call a variable in a text
This is always safe to use variables like this...
$text = This is . $variable;
Or
$text = This is . $variable[0];
Regards,
Samrat Kar
FRD, BARC
Tel: 022-25597295
Alternate Email: esam...@yahoo.com
-Original Message-
From: Kim Madsen [mailto:php@emax.dk]
Sent: Thursday, October 22, 2009 2:25 AM
To: a...@ashleysheridan.co.uk
Cc: David Murphy; php-general@lists.php.net
Subject: Re: [PHP] how call a variable in a text
Ashley Sheridan wrote on 2009-10-21 22:43:
The {} only become really useful when you're trying to reference arrays
within a string:
$var = array('great', 'boring');
$text = this is {$var[0]}.;
Without the curly braces, PHP wouldn't be able to figure out whether you
wanted the end string to be 'This is great.' or 'This is [0].' despite
the variable itself clearly being an array.
Ehh what? This has never been a problem for me:
$text = this is $var[0].;
However this does give an error (or notice, don't recall, haven't seen
the error in quite a while):
$text = this is $var['0'].;
In that case the solution is the curly brackets:
$text = this is {$var['0']}.;
--
Kind regards
Kim Emax - masterminds.dk
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Re: [PHP] how call a variable in a text
Erm, the braces are meant to go *around* the variable, not around a
bit of it:
print Test: {$var[0][0]};
Thanks,
Ash
http://www.ashleysheridan.co.uk
In many cases braces can go around the variable name not the necessarily
around the whole variable (like the bash scripts). Those are coming from
the manual:
?php
${date(M)} = Worked;
echo ${date(M)};
?
function test() {
// NULL -- not what initially expected
$string = '_POST';
var_dump(${$string});
// Works as expected
var_dump(${'_POST'});
// Works as expected
global ${$string};
var_dump(${$string});
}
So no they are not meant to go around. You can use them this way as well.
--
Thodoris
RE: [PHP] how call a variable in a text
Erm, the braces are meant to go *around* the variable, not around a bit
of it:
print Test: {$var[0][0]};
unrelated, just another usage of curly brackets
$_ = 'abc';
$i = 0;
echo $_{++$i}; // b
Regards
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RE: [PHP] how call a variable in a text
So no they are not meant to go around. You can use them this way as well.
that has almost the same meaning of
$_ = '_POST';
echo count($$_);
which again, for readability brackets are suggested to improve maintainability
$_ = '_POST';
echo count(${$_});
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Re: [PHP] how call a variable in a text
So no they are not meant to go around. You can use them this way as
well.
that has almost the same meaning of
$_ = '_POST';
echo count($$_);
which again, for readability brackets are suggested to improve
maintainability
$_ = '_POST';
echo count(${$_});
Regards
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I don't think it is about readability:
$arr[3] = 'test';
$test = 3;
//This prints $test
echo This doesn't work: $$arr[3];
//This prints 3
echo This works: ${$arr[3]};
Using the same type way as before in this thread.
My point is that in the curly braces you protect the way the evaluation
is going to be made into the string. So you can put them anywhere as
long as it is meaningful.
See some examples:
http://php.net/manual/en/language.types.string.php
in the complex (curly) syntax section.
--
Thodoris
Re: [PHP] how call a variable in a text
Using the same type way as before in this thread. This was supposed to come out as using the same way of thinking. But the English-Nerdish dictionary came out... -- Thodoris -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] how call a variable in a text
I don't think it is about readability:
$arr[3] = 'test';
$test = 3;
//This prints $test
echo This doesn't work: $$arr[3];
//This prints 3
echo This works: ${$arr[3]};
Using the same type way as before in this thread.
Above example is a classic one where readability and maintainability deal well
together.
First of all everything works as expected but obviously you need to know what
you need.
It is ambiguous to write $$arr[3] ... what do you expect?
Did you mean the variable derived by $arr[3]?
echo This works: {$$arr[3]};
since curly brackets make the meaning of the expression explicit, it will be 3
indeed.
What is the less ambiguous, readable, easy to maintain, way to obtain that
result?
echo This works: {${$arr[3]}};
If our aim is to get the variable with name equal to the value of $arr[3]
Can you see now why I am talking about good practice? Zero ambiguity, and
that's how I like to code
Regards
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Re: [PHP] how call a variable in a text
I don't think it is about readability:
$arr[3] = 'test';
$test = 3;
//This prints $test
echo This doesn't work: $$arr[3];
//This prints 3
echo This works: ${$arr[3]};
Using the same type way as before in this thread.
Above example is a classic one where readability and maintainability deal well
together.
First of all everything works as expected but obviously you need to know what
you need.
It is ambiguous to write $$arr[3] ... what do you expect?]
No I don't think it is. It produces $test and if this is what you need
echo it works nice :-) .
Did you mean the variable derived by $arr[3]?
echo This works: {$$arr[3]};
since curly brackets make the meaning of the expression explicit, it will be 3
indeed.
What is the less ambiguous, readable, easy to maintain, way to obtain that
result?
echo This works: {${$arr[3]}};
If our aim is to get the variable with name equal to the value of $arr[3]
Can you see now why I am talking about good practice? Zero ambiguity, and
that's how I like to code
Regards
Although I totally agree with the way of thinking and it is my style as
well.
But I though that the point of the thread was to present ways of putting
vars inside strings...
--
Thodoris
Re: [PHP] how call a variable in a text
On Thu, Oct 22, 2009 at 8:40 AM, Thodoris t...@kinetix.gr wrote:
I don't think it is about readability:
$arr[3] = 'test';
$test = 3;
//This prints $test
echo This doesn't work: $$arr[3];
//This prints 3
echo This works: ${$arr[3]};
Using the same type way as before in this thread.
Above example is a classic one where readability and maintainability deal
well together.
First of all everything works as expected but obviously you need to know
what you need.
It is ambiguous to write $$arr[3] ... what do you expect?]
No I don't think it is. It produces $test and if this is what you need
echo it works nice :-) .
Did you mean the variable derived by $arr[3]?
echo This works: {$$arr[3]};
since curly brackets make the meaning of the expression explicit, it will
be 3 indeed.
What is the less ambiguous, readable, easy to maintain, way to obtain that
result?
echo This works: {${$arr[3]}};
If our aim is to get the variable with name equal to the value of $arr[3]
Can you see now why I am talking about good practice? Zero ambiguity, and
that's how I like to code
Regards
Although I totally agree with the way of thinking and it is my style as
well.
But I though that the point of the thread was to present ways of putting
vars inside strings...
--
Thodoris
PHP knows that before $ and {} there is a variable name so, this is
completely correct for PHP
?php // tested on PHP 5.2.6, is this correct on PHP = 5 ?
$name = 'Martin';
$var = 'name';
echo $name {$name} ${name} ${ 'name' } ${$var} {$$var} ${${ 'var' }}
,PHP_EOL;
// am I missing any other way here?
// this is non-sense, but funny :)
$a = 'b';
$b = 'c';
$c = 'd';
$d = 'e';
$e = 'a';
$swap = 'a';
for($i=0,$e=rand(1, 100); $i$e; ++$i)
$swap = ${ $swap };
echo $swap, PHP_EOL;
I feel ${ $var } safer for developers than $$var because I feel it more
readable.
$$var can be interpreted by a typo for somebody, while with ${ $var } there
is no doubt what was the coder intent.
--
Martin Scotta
Re: [PHP] how call a variable in a text
2009/10/21 Bulend Kolay bma...@ihlas.net.tr: I 'll send a mail in html form using php5. cat send.php ?php $variable=date1 ; .. .. $message=' b There is a text $variable trial. /b '; mail($to, $subject, $message, $headers) ; ? when I run send.php, I get the mail. But I can't call variable called variable. it comes as string. How can I correct this? You need to use double quotes (or HEREDOC) if you want PHP to replace $variable with its value in the string: $message= b There is a text $variable trial. /b ; or $message = MESSAGE b There is a text $variable trial. /b MESSAGE; Andrew -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] how call a variable in a text
This is actually much better the { and } make it very obvious where the
variable is and also it can keep odd issues from occurring sometimes.
$message=b There is a text {$variable} trial. /b ;
There is always sprint type functions also.
David
-Original Message-
From: Andrew Ballard [mailto:aball...@gmail.com]
Sent: Wednesday, October 21, 2009 3:23 PM
To: Bulend Kolay
Cc: php-general@lists.php.net
Subject: Re: [PHP] how call a variable in a text
2009/10/21 Bulend Kolay bma...@ihlas.net.tr:
I 'll send a mail in html form using php5.
cat send.php
?php
$variable=date1 ;
..
..
$message='
b There is a text $variable trial. /b ';
mail($to, $subject, $message, $headers) ; ?
when I run send.php, I get the mail. But I can't call variable called
variable. it comes as string.
How can I correct this?
You need to use double quotes (or HEREDOC) if you want PHP to replace $variable
with its value in the string:
$message=
b There is a text $variable trial. /b ;
or
$message = MESSAGE
b There is a text $variable trial. /b MESSAGE;
Andrew
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RE: [PHP] how call a variable in a text
On Wed, 2009-10-21 at 15:40 -0500, David Murphy wrote:
This is actually much better the { and } make it very obvious where the
variable is and also it can keep odd issues from occurring sometimes.
$message=b There is a text {$variable} trial. /b ;
There is always sprint type functions also.
David
-Original Message-
From: Andrew Ballard [mailto:aball...@gmail.com]
Sent: Wednesday, October 21, 2009 3:23 PM
To: Bulend Kolay
Cc: php-general@lists.php.net
Subject: Re: [PHP] how call a variable in a text
2009/10/21 Bulend Kolay bma...@ihlas.net.tr:
I 'll send a mail in html form using php5.
cat send.php
?php
$variable=date1 ;
..
..
$message='
b There is a text $variable trial. /b ';
mail($to, $subject, $message, $headers) ; ?
when I run send.php, I get the mail. But I can't call variable called
variable. it comes as string.
How can I correct this?
You need to use double quotes (or HEREDOC) if you want PHP to replace
$variable with its value in the string:
$message=
b There is a text $variable trial. /b ;
or
$message = MESSAGE
b There is a text $variable trial. /b MESSAGE;
Andrew
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The {} only become really useful when you're trying to reference arrays
within a string:
$var = array('great', 'boring');
$text = this is {$var[0]}.;
Without the curly braces, PHP wouldn't be able to figure out whether you
wanted the end string to be 'This is great.' or 'This is [0].' despite
the variable itself clearly being an array.
Thanks,
Ash
http://www.ashleysheridan.co.uk
RE: [PHP] how call a variable in a text
True however K.I.S.S would say , if you can use it like
echo “This is a statement {$Blah}.”;
echo “This is also a statement {$objBlah-BlahString}.”;
echo “This is also a statement {$tBlah[‘BlahKey’]}.”;
You should do it so you are always using the same expected format, cleaner for
readability and training other people to understand how you code.
This is my personal thoughts on it, everyone has their own prefs.
David
From: Ashley Sheridan [mailto:a...@ashleysheridan.co.uk]
Sent: Wednesday, October 21, 2009 3:43 PM
To: David Murphy
Cc: php-general@lists.php.net
Subject: RE: [PHP] how call a variable in a text
On Wed, 2009-10-21 at 15:40 -0500, David Murphy wrote:
This is actually much better the { and } make it very obvious where the
variable is and also it can keep odd issues from occurring sometimes.
$message=b There is a text {$variable} trial. /b ;
There is always sprint type functions also.
David
-Original Message-
From: Andrew Ballard [mailto:aball...@gmail.com]
Sent: Wednesday, October 21, 2009 3:23 PM
To: Bulend Kolay
Cc: php-general@lists.php.net
Subject: Re: [PHP] how call a variable in a text
2009/10/21 Bulend Kolay bma...@ihlas.net.tr:
I 'll send a mail in html form using php5.
cat send.php
?php
$variable=date1 ;
..
..
$message='
b There is a text $variable trial. /b ';
mail($to, $subject, $message, $headers) ; ?
when I run send.php, I get the mail. But I can't call variable called
variable. it comes as string.
How can I correct this?
You need to use double quotes (or HEREDOC) if you want PHP to replace $variable
with its value in the string:
$message=
b There is a text $variable trial. /b ;
or
$message = MESSAGE
b There is a text $variable trial. /b MESSAGE;
Andrew
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18:42:00
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The {} only become really useful when you're trying to reference arrays within
a string:
$var = array('great', 'boring');
$text = this is {$var[0]}.;
Without the curly braces, PHP wouldn't be able to figure out whether you wanted
the end string to be 'This is great.' or 'This is [0].' despite the variable
itself clearly being an array.
Thanks,
Ash
http://www.ashleysheridan.co.uk
No virus found in this outgoing message.
Checked by AVG - www.avg.com
Version: 8.5.423 / Virus Database: 270.14.24/2449 - Release Date: 10/20/09
18:42:00
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Re: [PHP] how call a variable in a text
Ashley Sheridan wrote on 2009-10-21 22:43:
The {} only become really useful when you're trying to reference arrays
within a string:
$var = array('great', 'boring');
$text = this is {$var[0]}.;
Without the curly braces, PHP wouldn't be able to figure out whether you
wanted the end string to be 'This is great.' or 'This is [0].' despite
the variable itself clearly being an array.
Ehh what? This has never been a problem for me:
$text = this is $var[0].;
However this does give an error (or notice, don't recall, haven't seen
the error in quite a while):
$text = this is $var['0'].;
In that case the solution is the curly brackets:
$text = this is {$var['0']}.;
--
Kind regards
Kim Emax - masterminds.dk
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RE: [PHP] how call a variable in a text
On Wed, 2009-10-21 at 15:51 -0500, David Murphy wrote:
True however K.I.S.S would say , if you can use it like
echo “This is a statement {$Blah}.”;
echo “This is also a statement {$objBlah-BlahString}.”;
echo “This is also a statement {$tBlah[‘BlahKey’]}.”;
You should do it so you are always using the same expected format,
cleaner for readability and training other people to understand how
you code.
This is my personal thoughts on it, everyone has their own prefs.
David
From: Ashley Sheridan [mailto:a...@ashleysheridan.co.uk]
Sent: Wednesday, October 21, 2009 3:43 PM
To: David Murphy
Cc: php-general@lists.php.net
Subject: RE: [PHP] how call a variable in a text
On Wed, 2009-10-21 at 15:40 -0500, David Murphy wrote:
This is actually much better the { and } make it very obvious where the
variable is and also it can keep odd issues from occurring sometimes.
$message=b There is a text {$variable} trial. /b ;
There is always sprint type functions also.
David
-Original Message-
From: Andrew Ballard [mailto:aball...@gmail.com]
Sent: Wednesday, October 21, 2009 3:23 PM
To: Bulend Kolay
Cc: php-general@lists.php.net
Subject: Re: [PHP] how call a variable in a text
2009/10/21 Bulend Kolay bma...@ihlas.net.tr:
I 'll send a mail in html form using php5.
cat send.php
?php
$variable=date1 ;
..
..
$message='
b There is a text $variable trial. /b ';
mail($to, $subject, $message, $headers) ; ?
when I run send.php, I get the mail. But I can't call variable called
variable. it comes as string.
How can I correct this?
You need to use double quotes (or HEREDOC) if you want PHP to replace
$variable with its value in the string:
$message=
b There is a text $variable trial. /b ;
or
$message = MESSAGE
b There is a text $variable trial. /b MESSAGE;
Andrew
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The {} only become really useful when you're trying to reference
arrays within a string:
$var = array('great', 'boring');
$text = this is {$var[0]}.;
Without the curly braces, PHP wouldn't be able to figure out whether
you wanted the end string to be 'This is great.' or 'This is [0].'
despite the variable itself clearly being an array.
Thanks,
Ash
http://www.ashleysheridan.co.uk
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I reckon that part is all down to personal preference. Interesting to
see it works on objects too though. I've not seen that before, I was
always breaking outside of the strings for that type of thing.
Thanks,
Ash
http://www.ashleysheridan.co.uk
Re: [PHP] how call a variable in a text
On Wed, 2009-10-21 at 22:54 +0200, Kim Madsen wrote:
Ashley Sheridan wrote on 2009-10-21 22:43:
The {} only become really useful when you're trying to reference arrays
within a string:
$var = array('great', 'boring');
$text = this is {$var[0]}.;
Without the curly braces, PHP wouldn't be able to figure out whether you
wanted the end string to be 'This is great.' or 'This is [0].' despite
the variable itself clearly being an array.
Ehh what? This has never been a problem for me:
$text = this is $var[0].;
However this does give an error (or notice, don't recall, haven't seen
the error in quite a while):
$text = this is $var['0'].;
In that case the solution is the curly brackets:
$text = this is {$var['0']}.;
--
Kind regards
Kim Emax - masterminds.dk
Try this though:
?php
$var = array(array('great','alright'), 'boring');
print This is $var[0][0].;
?
Thanks,
Ash
http://www.ashleysheridan.co.uk
Re: [PHP] how call a variable in a text
Ashley Sheridan wrote on 2009-10-21 22:56:
Try this though:
?php
$var = array(array('great','alright'), 'boring');
print This is $var[0][0].;
Print This is different from your previous example :-);
--
Kind regards
Kim Emax - masterminds.dk
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Re: [PHP] how call a variable in a text
On Wed, 2009-10-21 at 23:11 +0200, Kim Madsen wrote:
Ashley Sheridan wrote on 2009-10-21 22:56:
Try this though:
?php
$var = array(array('great','alright'), 'boring');
print This is $var[0][0].;
Print This is different from your previous example :-);
--
Kind regards
Kim Emax - masterminds.dk
Yeah, I just forgot that PHP will correctly work with an array to a
depth of 1 inside of a string. Much like the above advice, I'd taken to
always using {} for arrays inside of strings, although not for strings
inside of strings unless I needed non-white-space text to immediately
follow said string. Would make more sense if I used the braces for
everything, but nobody has ever accused me of making too much sense
before!
Thanks,
Ash
http://www.ashleysheridan.co.uk
Re: [PHP] how call a variable in a text
Ashley Sheridan wrote:
On Wed, 2009-10-21 at 22:54 +0200, Kim Madsen wrote:
Ashley Sheridan wrote on 2009-10-21 22:43:
The {} only become really useful when you're trying to reference arrays
within a string:
$var = array('great', 'boring');
$text = this is {$var[0]}.;
Without the curly braces, PHP wouldn't be able to figure out whether you
wanted the end string to be 'This is great.' or 'This is [0].' despite
the variable itself clearly being an array.
Ehh what? This has never been a problem for me:
$text = this is $var[0].;
However this does give an error (or notice, don't recall, haven't seen
the error in quite a while):
$text = this is $var['0'].;
In that case the solution is the curly brackets:
$text = this is {$var['0']}.;
--
Kind regards
Kim Emax - masterminds.dk
Try this though:
?php
$var = array(array('great','alright'), 'boring');
print This is $var[0][0].;
?
Thanks,
Ash
http://www.ashleysheridan.co.uk
And since we are trying to cover all possible ways (works with double
quotes also):
$message = 'b There is a text ' . $variable . ' trial. /b';
--
Thanks!
-Shawn
http://www.spidean.com
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