Mixing
Hide DIV if function is empty
Clash Royale CLAN TAG#URR8PPP Hide DIV if function is empty
let's say I have the following code, how can I hide the DIV if the function is empty?
Similarly, how can I show another DIV if the function is empty?
<div class='box12'>
<h1>text<h1/>
<p><?php echo name5(); ?><p/>
</div>
Here is my function, for reference (it is returning a term meta field of a taxonomy in wordpress):
function regular_tran()
This seems like an X/Y issue. Can you post your full issue?
– FrankerZ
2 days ago
4 Answers
4
Check if the function returns something, then show the div if it does:
<?php
$name = name5();
if ($name)
?>
<div class='box12'>
<h1>text</h1>
<p><?php echo htmlentities($name); ?></p>
</div>
<?php
?>
I've also cleaned up your h1 and p ending tags. The htmlentities call is included to avoid issues where someone could insert HTML tags in their name and execute javascript, etc. through them.
htmlentities
To show a different message div, you can use else (or use !$name if you only want to show the div if the result evaluates as empty):
else
!$name
<?php
$name = name5();
if ($name)
?>
...
<?php
else
?>
<div>shown if empty</div>
<?php
?>
Thanks. Do I have to turn the function into a $variable to do this or can I do it without that?
– harvey
2 days ago
If the function is cheap, i.e. it doesn't involve an external resource like the database, etc., you can call the function multiple times instead. Replace
$name with the function call name5() in that case.– MatsLindh
2 days ago
$name
name5()
I am not sure what you mean by external resource. I added my function to the original question.
– harvey
2 days ago
Meaning that it hits the database, a web service etc. Your function definition seems to indicate that it's a wordpress plugin / theme, and the
_meta function does at least hit the database each time you use it. So no, you want to avoid calling the function more than once.– MatsLindh
2 days ago
_meta
Ok got it. Thanks! Do you recommend that I just use a variable instead of a function to begin with? If so how should I code it?
– harvey
2 days ago
Server code must spit out something for client javascript code. Change your code:
<p><?php echo name5(); ?><p/>
to something like:
<p>
<?php if (!name5()) ?>
<script>
$(".box12").hide(); // asuming you are using jQuery
</script>
<?php ?>
<p/>
you don't require javascript here. As long as the block is encased in a php if, it won't show
– Juakali92
2 days ago
@Juakali92 Well, it depends on a particular use case. This is just elementary example of how server side "talks" to client side. It's fully valid though answer by MatsLindh is more straightforward.
– lubosdz
2 days ago
Wrap the returned result of the function with an IF statement
IF
<?php
$result = name5();
if ($result && $result !== '') ?>
<div class='box12'>
<h1>text<h1/>
<p><?php echo $result ?><p/>
</div>
<?php ?>
You can try these methods.
1-
<div class="box12">
<h1>text</h1>
<?php if(function_exists('name5')) ?>
<p><?php echo name5(); ?></p>
<?php ?>
</div>
2-
<div class="box12">
<h1>text</h1>
<?php if(name5()) ?>
<p><?php echo name5(); ?></p>
<?php ?>
</div>
3-
<div class="box12">
<h1>text</h1>
<?php $css = (name5()) ? "block":"none"; ?>
<p style="display:<?=$css?>" >
<?php echo name5(); ?>
</p>
</div>
Why did you give a minus? Where did I make a mistake?
– Haşim Yerli
2 days ago
Welcome to SO. I haven't down-voted your answer, but it is likely that it is because your answer lacks explanation. Answers are more useful if they are specific. See stackoverflow.com/help/how-to-answer.
– Nick
2 days ago
Thank you for the information. I will pay attention.
– Haşim Yerli
2 days ago
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what is an empty function ?
– Reda Meskali
2 days ago