PHP数组没有按顺序显示

Question

Hi I have a WordPress site with an array with elements in, and I when I loop through the array I want the fields to display in the order as it is set in the array. For example:

My array:

$metas = get_post_meta($post->ID);
$metatodisplay = array('address', 'county', 'postcode', 'region', 'telephone', 'fax', 'email', 'website', 'contact', 'cab_member_since', 'twitter', 'linkedin');

My foreach loop:

foreach($metas as $key=>$value){
   if(in_array($key, $metatodisplay)){
     echo $key;
   }    
}

I want the array values to display in the order as shown in the $metatodisplay array. At this point they are just random on several pages, and on others they display correctly.

Answer 1

This should work:

foreach($metatodisplay as $key){
   if(isset($metas[$key])){
     echo $key;
   }    
}

Your code runs all values from $metas in their order and compares them to $metatodisplay (while the order of $metatodisplay is not taken into account). The changed code uses the exact order of $metatodisplay, ignoring the order within $metas.

If you want to do something with the values from $metas, you can simply accessing them, for example through echo $metas[$key]