我正在编写一个PHP函数来搜索Wordpress模板文件中的邮政编码数组。为什么我的函数不会返回一个值？

Question

该函数现在的目的是遍历多个逗号分隔的邮政编码列表（zip_codes_serviced的高级自定义字段），并将其与特定的邮政编码匹配（用于测试目的为33606）。如果匹配，则该函数应打印与该邮政编码相关联的城市和州域。这里是佛罗里达州坦帕市。参见下面的函数：

function zip_search($userZip){
    $posts = get_posts(array(
        'posts_per_page'    => -1,
        'post_type'         => 'Location'
    ));


    if( $posts ): 
        foreach( $posts as $post ): 
            $zipField=get_field('zip_codes_serviced');
            //echo $zipField;
            $zipString = $zipField . ', ';
            //echo $zipArray;

            $array = explode(', ' , $zipString); //split string into array seperated by ', '

            foreach($array as $value) //loop over values
            {
                $cityField=get_field('city');
                $stateField=get_field('state');

                if($value==$userZip){

                return ($cityField . '<br>' . $stateField);  
            }   
            }       
        endforeach;
        wp_reset_postdata(); 
    endif; 
}

然后我这样调用函数：

zip_search(33606);

function zip_search(){
        $posts = get_posts(array(
            'posts_per_page'    => -1,
            'post_type'         => 'Location'
        ));
        //Set user zip to 33606 for testing purposes
        $userZip=33606;

        if( $posts ): 
            foreach( $posts as $post ): 
                $zipField=get_field('zip_codes_serviced');
                //echo $zipField;
                $zipString = $zipField . ', ';
                //echo $zipArray;

                $array = explode(', ' , $zipString); //split string into array seperated by ', '

                foreach($array as $value) //loop over values
                {
                    $cityField=get_field('city');
                    $stateField=get_field('state');
                    //echo $value. '<br>';            
                    if($value==$userZip){

                    echo ($cityField . '<br>' . $stateField); //print 
                }   
                }       
            endforeach;
            wp_reset_postdata(); 
        endif; 
    }

zip_search();

这不是应该打印出城市和州的字段在页面上吗？当我把逻辑放在函数外部时，它可以工作，但我不能让它在函数内部工作。有人有什么建议吗？

让它工作的唯一方法是完全在函数之外--创建一个文件zip-search.php，然后插入<？php include（“phone-display.php”）；？>在我想要它显示的页面上，我非常肯定这是一个黑客；zip-search.php如下所示：

$posts = get_posts(array(
    'posts_per_page'    => -1,
    'post_type'         => 'Location'
));
//Set user zip to 33606 for testing purposes
$userZip=33606;
if( $posts ): 
     foreach( $posts as $post ): 
        $zipField=get_field('zip_codes_serviced');
        //echo $zipField;
        $zipString = $zipField . ', ';
        //echo $zipArray;

        $array = explode(', ' , $zipString); //split string into array seperated by ', '

        foreach($array as $value) //loop over values
        {
            $cityField=get_field('city');
            $stateField=get_field('state');
            //echo $value. '<br>';            
            if($value==$userZip){

               echo ($cityField . '<br>' . $stateField); //print 
           }    
         }       
     endforeach;
    wp_reset_postdata(); 
 endif; 

下面是我试图使zip code函数在其中工作的整个模板文件：

<?php 
 /*
Template Name: Location
*
*/
get_header(); 
nectar_page_header($post->ID); 

//full page
$fp_options = nectar_get_full_page_options();
extract($fp_options);

?>
<?php
function zip_search($userZip){
    $posts = get_posts(array(
        'posts_per_page'    => -1,
        'post_type'         => 'Location'
    ));
    //Set user zip to 33606 for testing purposes
    //$userZip=33606;

    if( $posts ): 
        foreach( $posts as $post ): 
            $zipField=get_field('zip_codes_serviced');
            //echo $zipField;
            $zipString = $zipField . ', ';
            //echo $zipArray;

            $array = explode(', ' , $zipString); //split string into array seperated by ', '

            foreach($array as $value) //loop over values
            {
                $cityField=get_field('city');
                $stateField=get_field('state');
                //echo $value. '<br>';            
                if($value==$userZip){

                echo ($cityField . '<br>' . $stateField); //print 
            }   
            }       
        endforeach;
        wp_reset_postdata(); 
    endif; 
}
?>


<div class="container-wrap">

    <div class="<?php if($page_full_screen_rows != 'on') echo 'container'; ?> main-content">

        <div class="row">

            <?php 

            //breadcrumbs
            if ( function_exists( 'yoast_breadcrumb' ) && !is_home() && !is_front_page() ){ yoast_breadcrumb('<p id="breadcrumbs">','</p>'); } 

             //buddypress
             global $bp; 
             if($bp && !bp_is_blog_page()) echo '<h1>' . get_the_title() . '</h1>';

             //fullscreen rows
             if($page_full_screen_rows == 'on') echo '<div id="nectar_fullscreen_rows" data-animation="'.$page_full_screen_rows_animation.'" data-row-bg-animation="'.$page_full_screen_rows_bg_img_animation.'" data-animation-speed="'.$page_full_screen_rows_animation_speed.'" data-content-overflow="'.$page_full_screen_rows_content_overflow.'" data-mobile-disable="'.$page_full_screen_rows_mobile_disable.'" data-dot-navigation="'.$page_full_screen_rows_dot_navigation.'" data-footer="'.$page_full_screen_rows_footer.'" data-anchors="'.$page_full_screen_rows_anchors.'">';

                 if(have_posts()) : while(have_posts()) : the_post(); 

                     the_content(); 

                 endwhile; endif; 

            if($page_full_screen_rows == 'on') echo '</div>'; ?>

        </div><!--/row-->

    </div><!--/container-->
    <span><?php zip_search(33606);?></span>
    <span>Locations Landing Page--where zip code function can go </span>
</div><!--/container-wrap-->

<?php get_footer(); ?>

Answer 1

我最终做了这件事，最后我决定把永久链接送回邮局更好，而不是城市和州：

function zip_search($userZip){

    $args = array(
    'posts_per_page'    => -1,
    'post_type'         => 'Locations'
    );

$wp_query = new WP_Query($args); 

if( $wp_query->have_posts() ): while( $wp_query->have_posts() ) : $wp_query->the_post();
      $zipField=get_field('zip_codes_services');

          $zipString = $zipField . ', ';        

          $array = explode(', ' , $zipString); //split string into array seperated by ', '

        foreach($array as $value) //loop over values
        {

            if($value==$userZip){
                $post_id = get_the_ID();
                $permalink=get_permalink($post_id);                 
               return ($permalink); //print 
           }    

        }
       endwhile; 
       wp_reset_postdata(); 
endif;
}