php wordpress function returning Warning: Missing argument 1

Question

I wrote this couples of functions, that alternate a exploded Custom Field string with the post permalink:

(where the Custom Field should look like this: ex. Google++http//:google.com")

// Custom Permalink
function custom_permalink($url){
 global $post;
 $link = get_post_meta($post->ID,'link',true);
 if ($link) {
 $pieces = explode("++", $link);
 $url = $pieces[1];
 } else {
 $url = the_permalink();
 }
 return $url;
}
// Via Text
function via_text($url){
 global $post;
 $link = get_post_meta($post->ID,'link',true);
 if ($link) {
 $pieces = explode("++", $link);
 $url = ' <span><a href="'.$pieces[1].'">Via '.$pieces[0].'</a></span>';
 } else {
 $url = ' ';
 }
 return $url;
}

... which work all right when tested on a MAMP server, but when deployed they return:

"Warning: Missing argument 1"

Any idea why this might be happening?

• RRikesh: Try to see at which line does this warning occur.
• janw: Turn on WP_DEBUG on your MAMP, see what it gives: codex.wordpress.org/Editing_wp-config.php#Debug

Answer 1

Ok... I figured it out... this happens when a class gets instantiated and theres no default argument for the constructor...

here are the working functions...

 // Custom Permalink
 function custom_permalink($url='') {
 global $post;
 $link = get_post_meta($post->ID,'link',true);
 if ($link) {
 $pieces = explode("++", $link);
 $url = $pieces[1];
 } else {
 $url = the_permalink();
 }
 return $url;
 }
 // Via Text
 function via_text($url='') {
 global $post;
 $link = get_post_meta($post->ID,'link',true);
 if ($link) {
 $pieces = explode("++", $link);
 $url = ' <span><a href="'.$pieces[1].'">Via '.$pieces[0].'</a></span>';
 } else {
 $url = ' ';
 }
 return $url;
 }

in case anyone is in need... what they do:

in case theres a post with the Custom Field 'link' (like so: Google++http://google.com) the function will replace the permalink with the Custom Link. So in the theme call: echo custom_permalink(); ... instead of the_permalink();

the via_text() function works a little different; it calls a span tag with the Custom Field 'link' exploded like so:

 <span><a href="http://google.com">Via Google</a></span>

hope this works for somebody else

:)