If statements
I have a header file that has a code like this
<img src="<?php echo $bg ?>">
On staff.php I have $bg defined as images/headimage.gif
Some pages I don't have $bg defined. Is there a way I can write an if statement that will make $bg = images/default.gif if there is no $bg defined in the page?
Thanks a lot
kazimmerman posted this at 00:59 — 12th November 2005.
He has: 698 posts
Joined: Jul 2005
Yep, do something like this:
<?phpif ($bg == "") {
$bg = "whatever";
}
?>
There are other ways to determine if a variable is empty, but that's what I always do.
Kurtis
teammatt3 posted this at 01:10 — 12th November 2005.
He has: 2,102 posts
Joined: Sep 2003
Can you explain that a little? Where would the default url bg go (http://localhost/images/default.gif) and the variable inside staff.php?
I am new to PHP, I just used includes before.
kazimmerman posted this at 01:14 — 12th November 2005.
He has: 698 posts
Joined: Jul 2005
Okay, what you can do is add the code I gave you to each page, and on the pages where $bg should be defined, add this line before the code above:
<?php$bg = "whatever";
?>
This way it will use whatever that line says, since $bg is not empty.
Kurtis
teammatt3 posted this at 01:28 — 12th November 2005.
He has: 2,102 posts
Joined: Sep 2003
Thanks mscreashuns, but I don't think that is what I am going for.
Let me rephrase...
If I define $bg on the staff.php, the background (bg) image will be displayed on staff.php by the header file where the bg tag is. Now, if I do not define $bg I want it to default to localhost/images/bg.gif. I want that code in the header. The site I am working on has 400+ pages and I can't go into everyone and place a code there.
Does that make sense?
This is how it would look in my own language.
if {bg = "anything"
then {make it the background image}
else {make the background = localhost/images/defaultbg.gif}
Renegade posted this at 01:48 — 12th November 2005.
He has: 3,022 posts
Joined: Oct 2002
What about something like this?
<?php// if string length is zero, or does not exist
if(strlen($bg) == \"0\") {
$bg = \"images/default.gif\";
}
?>
This is more or less what mscreashuns has posted. And you might want to get a bit more complicated and check if the image your changing exists. If it doesn't, then go to default.
<?php// if string length is zero, does not exist, or file doesn't exist
if(!file_exists($bg) || strlen($bg) == \"0\") {
$bg = \"images/default.gif\";
}
?>
That if() statement will go just before the line:
<?php<img src=\" echo $bg \">
?>
Which is in your header file right? So, there's no need to edit all 400+ pages. If $bg is already set, then, it won't go to default.
teammatt3 posted this at 02:03 — 12th November 2005.
He has: 2,102 posts
Joined: Sep 2003
Nice Renegade, that works perfectly.
kazimmerman posted this at 02:08 — 12th November 2005.
He has: 698 posts
Joined: Jul 2005
Right, you could place my code in the header file as well. I must've missed that you had a header file.
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