我的所有媒体文件图像的名称都像"icon_0001"、"icon_0002"、"图标_0003"、"插图_0001"，"插图_0002"answers"插图_0003"等，以及其他图像文件，如"SummonClear"、"StunPower"等。我已使用wordpress管理界面和var_dumping附件对此进行了检查。
现在我正试图用以下代码检索媒体文件ID：
$post_name = 'illustration_30004';
$args = array(
'post_type' => 'attachment',
'post_status' => 'inherit',
'post_title' => trim( $post_name ),
'post_mime_type' => 'image/png',
'posts_per_page' => -1
);
$wp_query = new WP_Query( $args );
foreach( $wp_query->posts as $image) {
var_dump( $image );
echo '<hr/>';
}
是的，这只是一个使用post_type = attachment的简单查询代码。然而，无论我给$post_name起什么名字，查询都会显示媒体库中的所有图像文件，如下所示：
object(WP_Post)#1386 (24) { ["ID"]=> int(40735) ["post_author"]=> string(1) "1" ["post_date"]=> string(19) "2014-10-08 10:22:04" ["post_date_gmt"]=> string(19) "2014-10-08 10:22:04" ["post_content"]=> string(0) "" ["post_title"]=> string(11) "SummonClear" ["post_excerpt"]=> string(0) "" ["post_status"]=> string(7) "inherit" ["comment_status"]=> string(4) "open" ["ping_status"]=> string(4) "open" ["post_password"]=> string(0) "" ["post_name"]=> string(13) "summonclear-3" ["to_ping"]=> string(0) "" ["pinged"]=> string(0) "" ["post_modified"]=> string(19) "2014-10-08 10:22:04" ["post_modified_gmt"]=> string(19) "2014-10-08 10:22:04" ["post_content_filtered"]=> string(0) "" ["post_parent"]=> int(0) ["guid"]=> string(104) "http://101.251.201.22/digital-opal-mu/elin-expedition/wp-content/uploads/sites/2/assets/SummonClear2.png" ["menu_order"]=> int(0) ["post_type"]=> string(10) "attachment" ["post_mime_type"]=> string(9) "image/png" ["comment_count"]=> string(1) "0" ["filter"]=> string(3) "raw" }
object(WP_Post)#1387 (24) { ["ID"]=> int(40734) ["post_author"]=> string(1) "1" ["post_date"]=> string(19) "2014-10-08 10:22:04" ["post_date_gmt"]=> string(19) "2014-10-08 10:22:04" ["post_content"]=> string(0) "" ["post_title"]=> string(11) "SummonChick" ["post_excerpt"]=> string(0) "" ["post_status"]=> string(7) "inherit" ["comment_status"]=> string(4) "open" ["ping_status"]=> string(4) "open" ["post_password"]=> string(0) "" ["post_name"]=> string(13) "summonchick-3" ["to_ping"]=> string(0) "" ["pinged"]=> string(0) "" ["post_modified"]=> string(19) "2014-10-08 10:22:04" ["post_modified_gmt"]=> string(19) "2014-10-08 10:22:04" ["post_content_filtered"]=> string(0) "" ["post_parent"]=> int(0) ["guid"]=> string(104) "http://101.251.201.22/digital-opal-mu/elin-expedition/wp-content/uploads/sites/2/assets/SummonChick2.png" ["menu_order"]=> int(0) ["post_type"]=> string(10) "attachment" ["post_mime_type"]=> string(9) "image/png" ["comment_count"]=> string(1) "0" ["filter"]=> string(3) "raw" }
object(WP_Post)#1388 (24) { ["ID"]=> int(40733) ["post_author"]=> string(1) "1" ["post_date"]=> string(19) "2014-10-08 10:22:04" ["post_date_gmt"]=> string(19) "2014-10-08 10:22:04" ["post_content"]=> string(0) "" ["post_title"]=> string(10) "StunPowder" ["post_excerpt"]=> string(0) "" ["post_status"]=> string(7) "inherit" ["comment_status"]=> string(4) "open" ["ping_status"]=> string(4) "open" ["post_password"]=> string(0) "" ["post_name"]=> string(12) "stunpowder-3" ["to_ping"]=> string(0) "" ["pinged"]=> string(0) "" ["post_modified"]=> string(19) "2014-10-08 10:22:04" ["post_modified_gmt"]=> string(19) "2014-10-08 10:22:04" ["post_content_filtered"]=> string(0) "" ["post_parent"]=> int(0) ["guid"]=> string(103) "http://101.251.201.22/digital-opal-mu/elin-expedition/wp-content/uploads/sites/2/assets/StunPowder2.png" ["menu_order"]=> int(0) ["post_type"]=> string(10) "attachment" ["post_mime_type"]=> string(9) "image/png" ["comment_count"]=> string(1) "0" ["filter"]=> string(3) "raw" }
object(WP_Post)#1389 (24) { ["ID"]=> int(40732) ["post_author"]=> string(1) "1" ["post_date"]=> string(19) "2014-10-08 10:22:04" ["post_date_gmt"]=> string(19) "2014-10-08 10:22:04" ["post_content"]=> string(0) "" ["post_title"]=> string(5) "Stomp" ["post_excerpt"]=> string(0) "" ["post_status"]=> string(7) "inherit" ["comment_status"]=> string(4) "open" ["ping_status"]=> string(4) "open" ["post_password"]=> string(0) "" ["post_name"]=> string(7) "stomp-3" ["to_ping"]=> string(0) "" ["pinged"]=> string(0) "" ["post_modified"]=> string(19) "2014-10-08 10:22:04" ["post_modified_gmt"]=> string(19) "2014-10-08 10:22:04" ["post_content_filtered"]=> string(0) "" ["post_parent"]=> int(0) ["guid"]=> string(98) "http://101.251.201.22/digital-opal-mu/elin-expedition/wp-content/uploads/sites/2/assets/Stomp2.png" ["menu_order"]=> int(0) ["post_type"]=> string(10) "attachment" ["post_mime_type"]=> string(9) "image/png" ["comment_count"]=> string(1) "0" ["filter"]=> string(3) "raw" }
...and 900+ more of these.
我知道我有一个名为"illustration_30004"的媒体文件，因为下面的结果包含在900+个结果中。
object(WP_Post)#1871 (24) { ["ID"]=> int(40973) ["post_author"]=> string(1) "1" ["post_date"]=> string(19) "2014-10-07 03:38:14" ["post_date_gmt"]=> string(19) "2014-10-07 03:38:14" ["post_content"]=> string(0) "" ["post_title"]=> string(18) "illustration_30004" ["post_excerpt"]=> string(0) "" ["post_status"]=> string(7) "inherit" ["comment_status"]=> string(4) "open" ["ping_status"]=> string(4) "open" ["post_password"]=> string(0) "" ["post_name"]=> string(18) "illustration_30004" ["to_ping"]=> string(0) "" ["pinged"]=> string(0) "" ["post_modified"]=> string(19) "2014-10-07 03:38:14" ["post_modified_gmt"]=> string(19) "2014-10-07 03:38:14" ["post_content_filtered"]=> string(0) "" ["post_parent"]=> int(0) ["guid"]=> string(110) "http://101.251.201.22/digital-opal-mu/elin-expedition/wp-content/uploads/sites/2/assets/illustration_30004.png" ["menu_order"]=> int(0) ["post_type"]=> string(10) "attachment" ["post_mime_type"]=> string(9) "image/png" ["comment_count"]=> string(1) "0" ["filter"]=> string(3) "raw" }
所以问题是…我的查询出了什么问题，为什么我得到的是所有媒体文件，而不是我想要的post_title？
补充道：还有一件事，尽管我不确定这是否相关——这些媒体文件已上传到wordpress，但尚未附加到任何帖子中。
我认为'post_title'不是一个有效的参数。参数
你可以试试：
"name"按帖子查找'p'按ID查找's'执行关键字搜索
多亏了Bizkit的建议，我发现了问题所在。我应该使用"name"而不是"post_title"，如下所示：
/**
* Get media image file by name
*/
function get_media_image( $image_name ) {
$post_name = trim( $image_name );
$args = array(
'post_type' => 'attachment',
'post_status' => 'inherit',
'name' => $post_name,
'post_mime_type' => 'image/png',
'posts_per_page' => -1
);
$wp_query = new WP_Query( $args );
$images = array();
foreach( $wp_query->posts as $image) {
$images[] = $image->guid;
}
if( sizeof( $images ) == 1 ) {
return $images[0];
}
}