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simple php question

 
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sb.net



Joined: 22 Sep 2006
Posts: 120
Location: USA

PostPosted: Sun 29 Oct '06 2:39    Post subject: simple php question Reply with quote

I am making a PHP script, and I can not figure this out.
Code:
<?php
$1star="<img src="images/1star.jpg">";
$2star="<img src="images/2star.jpg">";
echo $1star;
?>

What I am trying to do is that I want to put an image in when I type "$xstar." what am I doing wrong?
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Brian



Joined: 21 Oct 2005
Posts: 208
Location: Puyallup, WA USA

PostPosted: Sun 29 Oct '06 8:59    Post subject: Reply with quote

Maybe try this:

Code:
<?php

$stars = array(
   '<img src="images/1star.jpg">',
   '<img src="images/2star.jpg">',
);

echo $stars[0];
echo $stars[1];

// go random
echo $stars[ rand( 0, ( count( $stars ) - 1 ) ) ];

?>


Don't start a variable name with a number. It is also much more efficient to use an array to hold the values, in my view.

But with your code you have obvious errors, see corrections below:

Code:
<?php
$star1="<img src=\"images/1star.jpg\">";
$star2="<img src=\"images/2star.jpg\">";
echo $star1;
?>


...or use single quotes to wrap the variables...

Code:
<?php
$star1='<img src="images/1star.jpg">';
$star2='<img src="images/2star.jpg">';
echo $star1;
?>


But I'd suggest you stick with arrays.

Just as an aside, if you use ' single quotes instead of " double quotes when ever possible, it in theory will reduce the work on the PHP parsing engine because it does not parse the contents in the ' ... ' single quotes to look for varialbes as in:

Code:
<?php

$a = 'bla bla bla';

echo "<p>This is the value of string a:  $a</p>";

echo '<p>This is the value of string a:  $a</p>';


Notice that the output is very different, in the second example it does not work to display the value of $a, instead it simply prints $a, it does not treat it like a variable.

I prefer to use single quotes in nearly all cases where I echo a line of text.

I will use even with variables as in:

Code:
$a = 'bla bla bla';

echo '<p>This is the value of string a:' . $a . '</p>';


Just my two cents.
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James Blond
Moderator


Joined: 19 Jan 2006
Posts: 4966
Location: Germany, Next to Hamburg

PostPosted: Sun 29 Oct '06 15:13    Post subject: Re: simple php question Reply with quote

sb.net wrote:
I am making a PHP script, and I can not figure this out.
Code:
<?php
$1star="<img src="images/1star.jpg">";
$2star="<img src="images/2star.jpg">";
echo $1star;
?>

What I am trying to do is that I want to put an image in when I type "$xstar." what am I doing wrong?


There are two mistakes.
As Brian told: the thing with the quotes. $star1='<img src="images/1star.jpg">';

Secondly a String ($something) can't start with a number.

The difference " and ' in PHP in the pasrsing.

example:

$a='my house';
$b="I am living in $a";
$c='I am living in $a';

echo $b;
//will output I am living in my house

echo $c;
//will output I am living in $a
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sb.net



Joined: 22 Sep 2006
Posts: 120
Location: USA

PostPosted: Sun 29 Oct '06 16:36    Post subject: Reply with quote

Thanks Very Happy it will work great.

EDIT: It works, but I get confused typing "<?php echo $stars[3];" to get 4 stars. Is there a way too tell it to do it so that when I type "<?php echo $stars[3];" it means 3 stars?
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James Blond
Moderator


Joined: 19 Jan 2006
Posts: 4966
Location: Germany, Next to Hamburg

PostPosted: Sun 29 Oct '06 17:25    Post subject: Reply with quote

an array allways starts with 0 stars[0] will be the first Wink
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Brian



Joined: 21 Oct 2005
Posts: 208
Location: Puyallup, WA USA

PostPosted: Sun 29 Oct '06 20:28    Post subject: Reply with quote

Yes, arrays do always start with 0, but you could sort of "force" it to start with 1 as in:

Code:
$stars = array(
   '1' => 'bla bla bla',
   '2' => 'bla bla bla bla',
   '3' => 'bla bla bla bla bla',
);


Rather than try to make PHP be the creation you want it to be, something I used to try to do too, just learn the system and use it as it was intended. This will require you to re-tool your approach, but you will get far better results in the end.
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sb.net



Joined: 22 Sep 2006
Posts: 120
Location: USA

PostPosted: Sun 29 Oct '06 20:54    Post subject: Reply with quote

Ok, I am learning PHP, so I am wondering a lot. I found that in HTML to use it how it was intended.

--Thanks
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