{"id":1721,"date":"2020-08-05T09:37:10","date_gmt":"2020-08-05T01:37:10","guid":{"rendered":"http:\/\/admin.evshou.com\/?p=1721"},"modified":"2020-08-07T15:59:03","modified_gmt":"2020-08-07T07:59:03","slug":"wp%e6%95%99%e7%a8%8b%ef%bc%9a14wordpress%e6%96%87%e7%ab%a0%e8%87%aa%e5%ae%9a%e4%b9%89%e6%a0%8f%e7%9b%ae%e8%b0%83%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.9713job.com\/?p=1721","title":{"rendered":"wp\u6559\u7a0b\uff1a14WordPress\u6587\u7ae0\u81ea\u5b9a\u4e49\u680f\u76ee\u8c03\u7528"},"content":{"rendered":"

WordPress\u6587\u7ae0\u81ea\u5b9a\u4e49\u680f\u76ee\u8c03\u7528<\/h3>\r\n

<\/p>\r\n

 <\/p>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
<?php get_post_meta(); ?><\/td>\r\n\u83b7\u53d6\u6587\u7ae0\u81ea\u5b9a\u4e49\u680f\u76ee<\/td>\r\n<\/tr>\r\n
global $post;<\/td>\r\n\u5168\u5c40\u53d8\u91cf\uff0c\u5b58\u50a8\u5f53\u524d\u6587\u7ae0\u7684\u4fe1\u606f<\/td>\r\n<\/tr>\r\n
<?php add_post_meta(); ?><\/td>\r\n\u6dfb\u52a0\u4e00\u4e2a\u81ea\u5b9a\u4e49\u680f\u76ee<\/td>\r\n<\/tr>\r\n
<?php update_post_meta(); ?><\/td>\r\n\u66f4\u65b0\u81ea\u5b9a\u4e49\u680f\u76ee<\/td>\r\n<\/tr>\r\n
<?php delete_post_meta(); ?><\/td>\r\n\u5220\u9664\u81ea\u5b9a\u4e49\u680f\u76ee<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n

<\/p>\r\n

1.\u53ef\u4ee5\u901a\u8fc7\u540e\u53f0\u6dfb\u52a0\u81ea\u5b9a\u4e49\u680f\u76ee\uff0c\u5bf9\u5e94\u6570\u636e\u5b58\u653e\u4f4d\u7f6e<\/p>\r\n

\u5728\u540e\u53f0\u8fdb\u884c\u81ea\u5b9a\u4e49\u680f\u76ee \u586b\u5199<\/p>\r\n

2.get_post_meta \u9700\u8981\u5f53\u524d\u6587\u7ae0\u7684ID\uff0c\u53ef\u4ee5\u901a\u8fc7\u5168\u5c40\u53d8\u91cf $post \u83b7\u53d6<\/p>\r\n

<?php $\u53d8\u91cf\u540d = get_post_meta($post->ID,’\u81ea\u5b9a\u4e49\u680f\u76ee\u540d’,true); ?>
<?php echo $\u53d8\u91cf\u540d; ?>\u00a0<\/p>\r\n

3.\u4e00\u4e2akey\u53ef\u4ee5\u5bf9\u5e94\u591a\u4e2a\u503c\uff0c\u53ca\u83b7\u53d6\u65b9\u6cd5<\/p>\r\n

<?php $\u53d8\u91cf\u540d = get_post_meta($post->ID,’\u81ea\u5b9a\u4e49\u680f\u76ee\u540d’,false); ?>
<?php
foreach(\u53d8\u91cf\u540d as \u81ea\u5b9a\u4e49\u680f\u76ee\u540d){
echo $\u81ea\u5b9a\u4e49\u680f\u76ee\u540d .”<br \/>”;
}
?>\u00a0<\/p>\r\n

4.\u53ef\u4ee5\u901a\u8fc7 add_post_meta()\u65b9\u6cd5\u6dfb\u52a0\u81ea\u5b9a\u4e49\u680f\u76ee<\/p>\r\n

<?php\u00a0
$\u53d8\u91cf\u540d = get_post_meta($post->ID,’\u81ea\u5b9a\u4e49\u680f\u76ee\u540d’,false);
if( !\u53d8\u91cf\u540d){
add_post_meta($post->ID,’\u81ea\u5b9a\u4e49\u680f\u76ee\u540d’,’\u81ea\u5b9a\u4e49\u503c’);
}
?>
<?php
foreach(\u53d8\u91cf\u540d as \u81ea\u5b9a\u4e49\u680f\u76ee\u540d){
echo $\u81ea\u5b9a\u4e49\u680f\u76ee\u540d .”<br \/>”;
}
?>\u00a0<\/p>\r\n

5.\u5982\u4f55\u521b\u5efa\u9690\u85cf\u7684\u81ea\u5b9a\u4e49\u680f\u76ee<\/p>\r\n

<?php add_post_meta($post->ID,’_\u81ea\u5b9a\u4e49\u680f\u76ee\u540d’,’\u81ea\u5b9a\u4e49\u503c’); ?><\/p>\r\n

<?php echo\u00a0 get_post_meta($post->ID,’\u81ea\u5b9a\u4e49\u680f\u76ee\u540d’,true); ?><\/p>\r\n

6.\u5982\u4f55\u4f7f\u7528 update_post_meta() \u65b9\u6cd5\u66f4\u65b0\u81ea\u5b9a\u4e49\u680f\u76ee<\/p>\r\n

<?php\u00a0
$\u53d8\u91cf\u540d = get_post_meta($post->ID,’_\u81ea\u5b9a\u4e49\u680f\u76ee\u540d’,true);\u00a0
update_post_meta($post->ID,’_\u81ea\u5b9a\u4e49\u680f\u76ee\u540d’,$\u53d8\u91cf\u540d+1);
?>
<?php echo\u00a0 get_post_meta($post->ID,’\u81ea\u5b9a\u4e49\u680f\u76ee\u540d’,true); ?><\/p>\r\n

7.\u5982\u4f55\u4f7f\u7528 delete_post_meta() \u65b9\u6cd5\u5220\u9664\u81ea\u5b9a\u4e49\u680f\u76ee<\/p>\r\n

<?php delete_post_meta($post->ID,’\u81ea\u5b9a\u4e49\u680f\u76ee\u540d’); ?><\/p>\r\n

<?php delete_post_meta($post->ID,’\u81ea\u5b9a\u4e49\u680f\u76ee\u540d’,’\u503c’); ?><\/p>","protected":false},"excerpt":{"rendered":"

WordPress\u6587\u7ae0\u81ea\u5b9a\u4e49\u680f\u76ee\u8c03\u7528   <?php get_post_meta(); ?&g […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-1721","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/1721","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1721"}],"version-history":[{"count":6,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/1721\/revisions"}],"predecessor-version":[{"id":1786,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/1721\/revisions\/1786"}],"wp:attachment":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1721"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1721"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1721"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}