Can variables be placed in an array?

[sgtpepper]

Can variables be part of an array? If so, would this be the correct way to code this?

$roofarray = array('$roofvar1', '$roofvar2', '$roofvar3', '$roofvar4');

[laserlight]

more likely:

$roofarray = array($roofvar1, $roofvar2, $roofvar3, $roofvar4);

since the single quotes would mean no variable interpolation, hence your example would be for string literals rather than for variables.

[stolzyboy]

like she said, and btw is your other thread resolved

[sgtpepper]

When I place this in the code:

$roofarray = array($roofvar1, $roofvar2, $roofvar3, $roofvar4);

I get the results

, , , and

This isnt resolved yet...although I marked it that way...ick

complete code is:

<?
$roofarray = array($roofvar1, $roofvar2, $roofvar3, $roofvar4);
function pc_array_to_comma_string($roofarray) {
        switch (count($roofarray)) {
        case 0:
                return'';
        case 1:
                return reset($roofarray);
        case 2:
                return join(' and ' , $roofarray);
        default:
                $last = array_pop($roofarray);
                return join(', ', $roofarray) . ", and $last";
}
}
$thisroof=pc_array_to_comma_string($roofarray);
echo $thisroof;
?>

My roofvar is assigned elsewhere - thussly...

if(($display) == 'F01') {
$roofvar1 = "Shingle ";
}

[laserlight]

are the variables defined in the first place?

[stolzyboy]

and you can simply echo out $roofvar1 in the script before you do the array?

[sgtpepper]

look at my addition in my previous post...

[stolzyboy]

this works as dale showed in your other thread the way you want, like:

Scott, clif, leslie, mary, ashley, and poop.

 <? 
$array = array('Scott', 'clif', 'leslie', 'mary', 'ashley', 'poop'); 

function pc_array_to_comma_string($array) { 

    switch (count($array)) { 
    case 0: 
            return''; 

    case 1: 
            return reset($array); 

    case 2: 
            return join(' and ' , $array); 

    default: 
            $last = array_pop($array); 
            return join(', ', $array) . ", and $last"; 
} 
} 

$this=pc_array_to_comma_string($array); 
echo $this; 

?>

[stolzyboy]

and.....this also works the way you want it to

<?
$var1 = "Scott";
$var2 = "clif";
$var3 = "leslie";
$var4 = "mary";
$var5 = "ashley";
$var6 = "poop";
$array = array($var1, $var2, $var3, $var4, $var5, $var6); 

function pc_array_to_comma_string($array) { 

    switch (count($array)) { 
    case 0: 
            return''; 

    case 1: 
            return reset($array); 

    case 2: 
            return join(' and ' , $array); 

    default: 
            $last = array_pop($array); 
            return join(', ', $array) . ", and $last"; 
} 
} 

$this=pc_array_to_comma_string($array); 
echo $this; 

?>

[sgtpepper]

I think I found the issue:

Let me start from the beginning...

The database has a varibale called $display that displays a string of 3 digit letter number combinations for example (F01) these numbers represent 'things' so in my code I have:

if(($display) == 'F01') {
$roofvar1 = "Shingle ";
}
if(($display) == 'F02') {
$roofvar2 = "Fiberglass ";
}
if(($display) == 'F03') {
$roofvar3 = "Tar & Gravel ";
}
if(($display) == 'F04') {
$roofvar4 = "Wood Shingle ";
}
if(($display) == 'F05') {
$roofvar5 = "Tile ";
}

etc....

My previous problems was due to the fact I stopped at roofvar4.

Ok, now here is another question....

It could be that roofvar2 excists.....only.

So, if I have my array code like this
$roofarray = array($roofvar1, $roofvar2, $roofvar3, $roofvar4);

Will it display

, roofvar2, , and

In other words...how can I handle the result if a roofvar doesnt excist?

[sgtpepper]

Stolz,

Yes the other thread works fine...with dales code. I thought I marked that as resolved. If not, I will go do that now 🙂

[stolzyboy]

you can find which ones do with a loop, then in that loop you can [man]array_push[/man] the elements onto the end of the array

[laserlight]

Well, one way would be to remove those NULL entries in your array before applying your function.

e.g.

function not_null($var) {
	return $var != NULL;
}

$roofarray = array_filter($roof_array, "not_null");

[sgtpepper]

<?
$roofarray = array($roofvar1, $roofvar2, $roofvar3, $roofvar4,$roofvar5,$roofvar6,
$roofvar7,$roofvar8,$roofvar9,$roofvar10,$roofvar11,$roofvar12,$roofvar13,$roofvar14,$roofvar15,$roofvar16,);
function pc_array_to_comma_string($roofarray) {
        switch (count($roofarray)) {
        case 0:
                return'';
        case 1:
                return reset($roofarray);
        case 2:
                return join(' and ' , $roofarray);
        default:
                $last = array_pop($roofarray);
                return join(', ', $roofarray) . ", and $last";
        }
}
$thisroof=pc_array_to_comma_string($roofarray);
echo $thisroof;
?>

This is showing
, , , , , , Metal , , , , , , , , , and

Not cool....

I will attempt the 'push'.

[sgtpepper]

I attempted the array_push and got the errror:
Wrong parameter count for array_push()

<?
$roofarray = array($roofvar1, $roofvar2, $roofvar3, $roofvar4,$roofvar5,
$roofvar6,$roofvar7,$roofvar8,$roofvar9,$roofvar10,$roofvar11,$roofvar12,$roofvar13,$roofvar14,$roofvar15,$roofvar16,);
array_push ($roofarray);

function pc_array_to_comma_string($roofarray) {
        switch (count($roofarray)) {
        case 0:
                return'';
        case 1:
                return reset($roofarray);
        case 2:
                return join(' and ' , $roofarray);
        default:
                $last = array_pop($roofarray);
                return join(', ', $roofarray) . ", and $last";
        }
}
$thisroof=pc_array_to_comma_string($roofarray);
echo $thisroof;
?>

What about removing the NULL entieries like laserlight suggested...how do I implement that with this code?

[laserlight]

you would use the code I gave (I hope it works) somewhere before you use your function.

You might want to read up on [man]array_filter/man as well.

[sgtpepper]

Sorry laser for being such a pain in the rump....

<?
$roofarray = array($roofvar1, $roofvar2, $roofvar3, $roofvar4,$roofvar5,$roofvar6,$roofvar7,$roofvar8,
$roofvar9,$roofvar10,$roofvar11,$roofvar12,$roofvar13,$roofvar14,$roofvar15,$roofvar16);
function not_null($var) {
    return $var != NULL;
}

$roofarray = array_filter($roof_array, "not_null");

function pc_array_to_comma_string($roofarray) {
        switch (count($roofarray)) {
        case 0:
                return'';
        case 1:
                return reset($roofarray);
        case 2:
                return join(' and ' , $roofarray);
        default:
                $last = array_pop($roofarray);
                return join(', ', $roofarray) . ", and $last";
        }
}
$thisroof=pc_array_to_comma_string($roofarray);
echo $thisroof;
?>

I must have placed your code in the wrong place....can you tell me where I should have placed it? I know...sorry for being a pain.

[laserlight]

you copied my code without changing it to fit your own.

Take for example:

<?
$roofvar2 = "hello";
$roofvar5 = "world";
$roofarray = array($roofvar1, $roofvar2, $roofvar3,  $roofvar4,$roofvar5,$roofvar6,$roofvar7,$roofvar8);
function not_null($var) {
    return $var != NULL;
}

$roofarray = array_filter($roofarray, "not_null");

function pc_array_to_comma_string($roofarray) {
        switch (count($roofarray)) {
        case 0:
                return'';
        case 1:
                return reset($roofarray);
        case 2:
                return join(' and ' , $roofarray);
        default:
                $last = array_pop($roofarray);
                return join(', ', $roofarray) . ", and $last";
        }
}
$thisroof=pc_array_to_comma_string($roofarray);
echo $thisroof;
?> 

the result is:
hello and world

as expected.

[sgtpepper]

Thank you so much....seems fine!

[stolzyboy]

If this is resolved, use the link below to mark it so