Analysis of get_post_custom() function usage in WordPress development, wordpressgetpost_PHP tutorial

The get_post_custom() function in WordPress development uses parsing. wordpressgetpost

is the same as get_post_meta(). The custom field used to return the article deserves a function, except get_post_custom() Functions are simpler to use and you don't even need to set any parameters if used in a loop.

In fact, the basic implementation of the get_post_custom() function is similar to get_post_meta()~

get_post_custom() uses

get_post_custom($postid);

Accepts only one parameter
$postid article id;

Example demonstration

 if (have_posts()) :
 
 while (have_posts()) : the_post(); 
  var_dump(get_post_custom());
 
 endwhile; 
 
 endif;

The output results are as follows: (if the following fields are set)

array(4) {
[“_edit_last”]=>
array(1) {
[0]=>
string(1) “1”
}
[“_edit_lock”]=>
array(1) {
[0]=>
string(12) “1342451729:1”
}
[“_thumbnail_id”]=>
array(1) {
[0]=>
string(3) “228”
}
[“xzmeta”]=>
array(2) {
[0]=>
string(3) “xz1”
[1]=>
string(3) “xz2”
}
}

get_post_custom_values ​​and get_post_custom_keys

Because custom fields are divided into keys and values, sometimes we need to obtain these two values ​​separately, so WordPress has derived two functions: get_post_custom_values ​​and get_post_custom_keys. As for As for the meaning, I really haven’t found much significance. Except for its use when deleting custom fields in batches, I really can’t think of any place where it can be used. Maybe it will be very useful in a vast CMS theme. The importance of the crew.

I wrote about the get_post_custom function and get_post_meta function before. I thought privately that there are not many functions related to custom fields anyway, so I sorted it out and simply wrote down all the functions related to custom fields, excluding of course Some basic implementation codes of the function.
get_post_custom_values ​​is used to get the value of the specified custom field of the current article and returns it in the form of an array.

 while (have_posts()) : the_post(); 
  var_dump(get_post_custom_values(‘xzmeta'));
 endwhile; 
 
 endif;

The following results will be returned roughly

(if the custom field is set)

array(2) {
[0]=>
string(3) “xz1”
[1]=>
string(3) “xz2”
}

get_post_custom_keys is used to get the key values ​​of all custom fields in the current article.

 if (have_posts()) :
 while (have_posts()) : the_post(); 
  var_dump(get_post_custom_keys());
 endwhile; 
 endif;

You will roughly get the following results:
(If custom fields are set)

array(4) {
[0]=>
string(10) “_edit_last”
[1]=>
string(10) “_edit_lock”
[2]=>
string(13) “_thumbnail_id”
[3]=>
string(6) “xzmeta”
}

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