Array

[FiremanSAM]

I have made a script that redirect a user to the page related to the month.
I bind the month numbers to the url as uitrukken.php?md=05

Now....i would print the month name on my page. I have made the following
array.

<?PHP
$maanden = array(
01 => "Januari",
02 => "Februari",
03 => "Maart",
04 => "April",
05 => "Mei",
06 => "Juni",
07 => "Juli",
08 => "Augustus",
09 => "September",
10 => "Oktober",
11 => "November",
12 => "December"
);

echo $maanden['$md'];
?>

Why doen't show dis the month. In which format can i use a array with a
variabele as echo $maanden['$md'];

FiremanSAM

[Jan Pieter Kunst]

In article <tZfbb.5640$P51.8734@amstwist00>,
"FiremanSAM" <fi********@co.uk> wrote:

Why doen't show dis the month. In which format can i use a array with a
variabele as echo $maanden['$md'];

use double quotes, otherwise variables will not be interpolated:

echo $maanden["$md"];

If register_globals is off in your setup, you'll need to do this:

echo $maanden[$_GET['md']];

JP

--
Sorry, <de*****@cauce.org> is een "spam trap".
E-mail adres is <jpk"at"akamail.com>, waarbij "at" = @.

[Ronald Beilsma]

"FiremanSAM" <fi********@co.uk> schreef in bericht
news:tZfbb.5640$P51.8734@amstwist00...

I have made a script that redirect a user to the page related to the month. I bind the month numbers to the url as uitrukken.php?md=05

Now....i would print the month name on my page. I have made the following
array.

<?PHP
$maanden = array(
01 => "Januari",
02 => "Februari",
03 => "Maart",
04 => "April",
05 => "Mei",
06 => "Juni",
07 => "Juli",
08 => "Augustus",
09 => "September",
10 => "Oktober",
11 => "November",
12 => "December"
);

echo $maanden['$md'];
?>

Why doen't show dis the month. In which format can i use a array with a
variabele as echo $maanden['$md'];

Drop the single quotes:

echo $maanden[$md];

[Bernhard Hörlberger]

> > $maanden = array(

01 => "Januari",
02 => "Februari",
03 => "Maart",
04 => "April",
05 => "Mei",
06 => "Juni",
07 => "Juli",
08 => "Augustus",
09 => "September",
10 => "Oktober",
11 => "November",
12 => "December"
);

you could of course use strftime("%B") (http://at2.php.net/strftime) and
setlocale() (http://at2.php.net/manual/en/function.setlocale.php) to have
the month names in your language.....

[BKDotCom]

Jan Pieter Kunst <de*****@cauce.org> wrote in message >

use double quotes, otherwise variables will not be interpolated:

echo $maanden["$md"];

sorry, you've just hit my pet-peeve. Surrounding a variable in
double-quotes is a waste, PHP doesn't know what's in the quotes and
must go in a parse the string to find any variables to expand,
escaped, chars, or whatever. Variables don't need to be quoted.. just
use $maanden[$md]. Can someone back-up my belief that they
"shouldn't" be quoted?

[Matthias Esken]

Br******@swbell.net (BKDotCom) schrieb:

Jan Pieter Kunst <de*****@cauce.org> wrote in message >

use double quotes, otherwise variables will not be interpolated:

echo $maanden["$md"];

sorry, you've just hit my pet-peeve. Surrounding a variable in
double-quotes is a waste, PHP doesn't know what's in the quotes and
must go in a parse the string to find any variables to expand,
escaped, chars, or whatever. Variables don't need to be quoted.. just
use $maanden[$md]. Can someone back-up my belief that they
"shouldn't" be quoted?

It takes just some few extra microseconds of time if you use double
quotes, but that adds up with each time you run those scripts.

I prefer to use no quotes if there would be just one variable inside the
string and I use single quotes if the string contains no variable that
has to be interpolated.

Regards,
Matthias

[Jan Pieter Kunst]

In article <e8**************************@posting.google.com >,
Br******@swbell.net (BKDotCom) wrote:

use double quotes, otherwise variables will not be interpolated:

echo $maanden["$md"];

sorry, you've just hit my pet-peeve. Surrounding a variable in
double-quotes is a waste, PHP doesn't know what's in the quotes and
must go in a parse the string to find any variables to expand,
escaped, chars, or whatever. Variables don't need to be quoted.. just
use $maanden[$md]. Can someone back-up my belief that they
"shouldn't" be quoted?

You are right. I probably had the rule 'You should always use quotes
around a string literal array index'
(see <http://nl2.php.net/types.array>) in mind, but that is about string
literals, not about variables. There is no need to use double quotes
around variable array keys. (I doubt that there will be a noticeable
speed difference, though.)

JP

--
Sorry, <de*****@cauce.org> is een "spam trap".
E-mail adres is <jpk"at"akamail.com>, waarbij "at" = @.

[Randell D.]

"BKDotCom" <Br******@swbell.net> wrote in message
news:e8**************************@posting.google.c om...

Jan Pieter Kunst <de*****@cauce.org> wrote in message >

use double quotes, otherwise variables will not be interpolated:

echo $maanden["$md"];

sorry, you've just hit my pet-peeve. Surrounding a variable in
double-quotes is a waste, PHP doesn't know what's in the quotes and
must go in a parse the string to find any variables to expand,
escaped, chars, or whatever. Variables don't need to be quoted.. just
use $maanden[$md]. Can someone back-up my belief that they
"shouldn't" be quoted?

I *would* have agreed until I tested both... and you'll be surprised of the
results...

The performance difference would be small on a quiet server with a small
workload - However, given a busier environment, the performance enhancement
differs almost 50%.

In my test, I had a loop which checked the value of an array element - The
element was also a variable - First test had the element variable inside
quotes (thus $testArray["$element"]) while the second test excluded the
double quotes (thus $testArray[$element]).

I ran this on my server whereby I was the only user - the box was almost
asleep so I cannot blame it on other environment changes - I also ran the
test twice. Test 1 took 86seconds while test 2 took 152 seconds...

Surprised? So was I... It looks like its better to include double quotes as
opposed to excluding them - I've not worked out why just yet... I'll pitch a
seperate post asking folk to comment on this... My test script follows
below:

<?
// Perform a test $maxLoop number of times, count the number of seconds
// it takes to complete the loop - Test 1 has the array element named
// inside double quotes, Test 2 excludes the double quotes
set_time_limit(250);
$testArray=$_ENV;
$maxLoop=100000;
/////////////////////// Test 1 ////////////////////
$start=time();
for($loopMany=0; $loopMany<$maxLoop; ++$loopMany)
{ foreach($testArray as $elementName=>$elementValue)
{ if($testArray["$elementName"]=="HOST")
{ $thisHost="$elementValue"; }
}
}
$end=time();
$difference=$end-$start;
print("<br>Duration 1: $difference<hr>");

set_time_limit(250);
$testArray=$_ENV;
$maxLoop=100000;
/////////////////////// Test 2 ////////////////////
for($loopMany=0; $loopMany<$maxLoop; ++$loopMany)
{ foreach($testArray as $elementName=>$elementValue)
{ if($testArray[$elementName]=="HOST")
{ $thisHost="$elementValue"; }
}
}
$end=time();
$difference=$end-$start;
print("<br>Duration 2: $difference<hr>");
?>

[BKDotCom]

*cough cough*
Your test 2 took 66 seconds.
you didn't reinitialize $start after test1 compleated... therefore
152 seconds is the total time your script ran.

so:
86 sec for test 1 (quotes)
66 sec for test 2 (no quotes)
152 sec: total

but, bonus points to you for actually taking the time to research this.
"Randell D." <yo**************************@yahoo.com> wrote in message news:<Ee*********************@news1.calgary.shaw.c a>...

"BKDotCom" <Br******@swbell.net> wrote in message
news:e8**************************@posting.google.c om...

Jan Pieter Kunst <de*****@cauce.org> wrote in message >

use double quotes, otherwise variables will not be interpolated:

echo $maanden["$md"];

sorry, you've just hit my pet-peeve. Surrounding a variable in
double-quotes is a waste, PHP doesn't know what's in the quotes and
must go in a parse the string to find any variables to expand,
escaped, chars, or whatever. Variables don't need to be quoted.. just
use $maanden[$md]. Can someone back-up my belief that they
"shouldn't" be quoted?

I *would* have agreed until I tested both... and you'll be surprised of the
results...

The performance difference would be small on a quiet server with a small
workload - However, given a busier environment, the performance enhancement
differs almost 50%.

In my test, I had a loop which checked the value of an array element - The
element was also a variable - First test had the element variable inside
quotes (thus $testArray["$element"]) while the second test excluded the
double quotes (thus $testArray[$element]).

I ran this on my server whereby I was the only user - the box was almost
asleep so I cannot blame it on other environment changes - I also ran the
test twice. Test 1 took 86seconds while test 2 took 152 seconds...

Surprised? So was I... It looks like its better to include double quotes as
opposed to excluding them - I've not worked out why just yet... I'll pitch a
seperate post asking folk to comment on this... My test script follows
below:

<?
// Perform a test $maxLoop number of times, count the number of seconds
// it takes to complete the loop - Test 1 has the array element named
// inside double quotes, Test 2 excludes the double quotes
set_time_limit(250);
$testArray=$_ENV;
$maxLoop=100000;
/////////////////////// Test 1 ////////////////////
$start=time();
for($loopMany=0; $loopMany<$maxLoop; ++$loopMany)
{ foreach($testArray as $elementName=>$elementValue)
{ if($testArray["$elementName"]=="HOST")
{ $thisHost="$elementValue"; }
}
}
$end=time();
$difference=$end-$start;
print("<br>Duration 1: $difference<hr>");

set_time_limit(250);
$testArray=$_ENV;
$maxLoop=100000;
/////////////////////// Test 2 ////////////////////
for($loopMany=0; $loopMany<$maxLoop; ++$loopMany)
{ foreach($testArray as $elementName=>$elementValue)
{ if($testArray[$elementName]=="HOST")
{ $thisHost="$elementValue"; }
}
}
$end=time();
$difference=$end-$start;
print("<br>Duration 2: $difference<hr>");
?>

[Randell D.]

"BKDotCom" <Br******@swbell.net> wrote in message
news:e8**************************@posting.google.c om...

*cough cough*
Your test 2 took 66 seconds.
you didn't reinitialize $start after test1 compleated... therefore
152 seconds is the total time your script ran.

so:
86 sec for test 1 (quotes)
66 sec for test 2 (no quotes)
152 sec: total

but, bonus points to you for actually taking the time to research this.
"Randell D." <yo**************************@yahoo.com> wrote in message

news:<Ee*********************@news1.calgary.shaw.c a>...

"BKDotCom" <Br******@swbell.net> wrote in message
news:e8**************************@posting.google.c om...

Jan Pieter Kunst <de*****@cauce.org> wrote in message >
> use double quotes, otherwise variables will not be interpolated:
>
> echo $maanden["$md"];

sorry, you've just hit my pet-peeve. Surrounding a variable in
double-quotes is a waste, PHP doesn't know what's in the quotes and
must go in a parse the string to find any variables to expand,
escaped, chars, or whatever. Variables don't need to be quoted.. just
use $maanden[$md]. Can someone back-up my belief that they
"shouldn't" be quoted?

I *would* have agreed until I tested both... and you'll be surprised of the results...

The performance difference would be small on a quiet server with a small
workload - However, given a busier environment, the performance enhancement differs almost 50%.

In my test, I had a loop which checked the value of an array element - The element was also a variable - First test had the element variable inside
quotes (thus $testArray["$element"]) while the second test excluded the
double quotes (thus $testArray[$element]).

I ran this on my server whereby I was the only user - the box was almost
asleep so I cannot blame it on other environment changes - I also ran the test twice. Test 1 took 86seconds while test 2 took 152 seconds...

Surprised? So was I... It looks like its better to include double quotes as opposed to excluding them - I've not worked out why just yet... I'll pitch a seperate post asking folk to comment on this... My test script follows
below:

<?
// Perform a test $maxLoop number of times, count the number of seconds
// it takes to complete the loop - Test 1 has the array element named
// inside double quotes, Test 2 excludes the double quotes
set_time_limit(250);
$testArray=$_ENV;
$maxLoop=100000;
/////////////////////// Test 1 ////////////////////
$start=time();
for($loopMany=0; $loopMany<$maxLoop; ++$loopMany)
{ foreach($testArray as $elementName=>$elementValue)
{ if($testArray["$elementName"]=="HOST")
{ $thisHost="$elementValue"; }
}
}
$end=time();
$difference=$end-$start;
print("<br>Duration 1: $difference<hr>");

set_time_limit(250);
$testArray=$_ENV;
$maxLoop=100000;
/////////////////////// Test 2 ////////////////////
for($loopMany=0; $loopMany<$maxLoop; ++$loopMany)
{ foreach($testArray as $elementName=>$elementValue)
{ if($testArray[$elementName]=="HOST")
{ $thisHost="$elementValue"; }
}
}
$end=time();
$difference=$end-$start;
print("<br>Duration 2: $difference<hr>");
?>

That is a bit embarrassing isn't it.... thanks for pointing that one out -
It could have steered me (and others) in the wrong direction...