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Passing simple php value in Wordpress single.php file

Posted on 2011-02-20
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Last Modified: 2012-05-11
These 2 lines:

$str = get_post_meta($post->ID, $key, true);
echo 'str is '.$str;

output this:
"str is http://www.site.com/-dan-baker.mp3 6787576 audio/mpeg"

That has been TESTED on my wordpress single.php file.

The original code is attached bellow, it returns the mp3 URL inside the string BUT it works fine ONLY if I provide $str value direct, like this: $str = "http://www.site.com/-dan-baker.mp3 6787576 audio/mpeg"

If I provide it like this: $str = get_post_meta($post->ID, $key, true); then $file will return empty.

Why? I am 100% sure get_post_meta($post->ID, $key, true) is returning the string.

I hope you understand.
Thank you.




<?php

// Code tested on wordpress file single.php

$key="enclosure";
$str = get_post_meta($post->ID, $key, true);
echo 'str is '.$str; //this output: str is http://www.site.com/-dan-baker.mp3 6787576 audio/mpeg

$split_at_space=explode(" ",$str);
$mimetype=array_pop($split_at_space);
$numbers=array_pop($split_at_space);
$file=join(" ",$split_at_space);
echo "\n";

echo 'File:'.$file;
?>

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0
Comment
Question by:Fernanditos
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15 Comments
 
LVL 27

Expert Comment

by:Lukasz Chmielewski
ID: 34937971
Are you sure there are no whitespaces characters ? Trim the $str.
$str = trim(get_post_meta($post->ID, $key, true));
0
 

Author Comment

by:Fernanditos
ID: 34938013
Yes there are white spaces:

$str = "http://www.site.com/-dan-baker.mp3 6787576 audio/mpeg"

the crazy thing is that it works perfect if I assign the value to $str manually, like above.

But if I assign it this way: $str = get_post_meta($post->ID, $key, true); then $file return empty.

and again: I have test get_post_meta($post->ID, $key, true); is returning the same string.

Any idea?
0
 

Author Comment

by:Fernanditos
ID: 34938042
Look, I will post here the real code here and I take screeshot code result, this will clear any doubt:

result of attached code
<?php
$key="enclosure";
$str = get_post_meta($post->ID, $key, true);
echo 'str: '.$str; 

$split_at_space=explode(" ",$str);
$mimetype=array_pop($split_at_space);
$numbers=array_pop($split_at_space);
$file=join(" ",$split_at_space);
echo "<br/>";

echo 'File:'.$file;
?>

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LVL 27

Expert Comment

by:Lukasz Chmielewski
ID: 34938048
Maybe the get_post_meta($post->ID, $key, true); ECHOES the string instead of returning a string value ?
0
 
LVL 27

Expert Comment

by:Lukasz Chmielewski
ID: 34938056
try doing it this way:
$str = echo get_post_meta($post->ID, $key, true);
0
 
LVL 27

Expert Comment

by:Lukasz Chmielewski
ID: 34938085
I was thinking about the whitespaces at the both ends of the returned string. This would cause the splitting function return incorrect results.

One more thing, what does this do:

<?php
$key="enclosure";
$str = get_post_meta($post->ID, $key, true);
echo 'str: '.$str; 

$split_at_space=explode(" ",$str);
$mimetype=array_pop($split_at_space);
$numbers=array_pop($split_at_space);

print_r($split_at_space);

$file=join(" ",$split_at_space);
echo "<br/>";

echo 'File:'.$file;
?>

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0
 

Author Comment

by:Fernanditos
ID: 34938254
@Roads
Maybe the get_post_meta($post->ID, $key, true); ECHOES the string instead of returning a string value ?

Yes this has sense, I tried: $str = echo get_post_meta($post->ID, $key, true);  but I get syntax error, unexpected T_ECHO.

The second last solution you posted not woring, return this:
 result last solution by Roads
0
 
LVL 27

Expert Comment

by:Lukasz Chmielewski
ID: 34938404
Well, it does work. It points that the $split_at_space is an empty array after poping

$split_at_space=explode(" ",$str);
echo"after exploding: ";
print_r($split_at_space);
$mimetype=array_pop($split_at_space);
$numbers=array_pop($split_at_space);

echo"$mime_type, $numbers";

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What does this show ?
0
 
LVL 27

Accepted Solution

by:
Lukasz Chmielewski earned 2000 total points
ID: 34938416
If this shows Array () again, try like this

$str = echo "".get_post_meta($post->ID, $key, true);

but it seems very strange - assigning should work like this
$str = get_post_meta($post->ID, $key, true);
if this shows us that the $str is empty - then the function get_post_meta($post->ID, $key, true); returns nothing.
0
 

Author Comment

by:Fernanditos
ID: 34938478
I think you missunderstood something:

"you said: if this shows us that the $str is empty - then the function get_post_meta($post->ID, $key, true); returns nothing."

URL result that you see printed is the returned value of get_post_meta($post->ID, $key, true); SO this is not returning empty. See my code.

Notice that in my screenshot, I have 2 outputs: $str and $file

my problem is with $file that is returning EMPTY.

this is the most strange thing I have ever seen.
0
 

Author Comment

by:Fernanditos
ID: 34938513
I just can NOT capture the value returned by get_post_meta($post->ID, $key, true); into a variable.

I can just print it like: echo get_post_meta($post->ID, $key, true);

does this makes sense for you?
0
 

Author Comment

by:Fernanditos
ID: 34938534
I think this issue is relate to the nature of get_post_meta of wordpress: http://codex.wordpress.org/Using_Custom_Fields

no idea.
0
 
LVL 27

Expert Comment

by:Lukasz Chmielewski
ID: 34938594
You would have to find the file where the function is stored to see what it returns.
0
 
LVL 27

Expert Comment

by:Lukasz Chmielewski
ID: 34938647
Change true to false
get_post_meta($post->ID, $key, false);
0
 
LVL 111

Expert Comment

by:Ray Paseur
ID: 34938841
Please do this for us:

$str = get_post_meta($post->ID, $key, true);
var_dump($str);

And show us the var_dump() output.  It will tell the data type as well as the contents.  Use "view source" and copy the relevant lines, then post them here in the code snippet.  Thanks, ~Ray
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