Overview:
我创作了一个子主题，并意识到它的功能。php导致媒体库出现问题，并导致编辑帖子后出现“白屏”。我通过从函数中删除所有内容修复了此问题。php，但我不知道是什么导致了这种情况。
信息：Production Server: 多站点，Wordpress 3.8.1Local development server（又名“localhost”）：Wordpress 3.8.1和AMPPS v2。2（php v5.3）在Windows 7 Pro SP1中。
The Media-Library problem:标题-->“选择图像”->“从媒体库中选择图像”AND 转到帖子-->“所有帖子”->“编辑帖子”->“设置特色图片”时，媒体库没有显示任何内容，就好像我的媒体库是空的一样。尽管转到仪表板-->媒体-->库并验证是否存在媒体内容，但仍会出现这种情况
白屏问题：
- 在转到“帖子-->所有帖子-->编辑帖子-->更新”时，单击按钮更新/创建帖子时会出现一个白屏CNTRL+s 从所见即所得中保存帖子不会导致出现白色屏幕
功能。php的功能就是这样。php看起来像之前一样，我通过删除所有内容修复了这个问题。（结果证明，无论如何，我不再需要其中的函数）。同时打开http://pastebin.com/KS66yfqK
<!-- In a child theme, all of the functions of the parent theme are present, unless overridden here -->
<?php
function cals_fetch_feed2($feed_uri,$num_items, $echo = 1, $length =-1, $exclude=\'\'){
//NOTE: to disable cache, go to feed.php and replace timestamp in
// $feed->set_cache_duration(apply_filters(\'wp_feed_cache_transient_lifetime\', 43200, $url));
$i = rand(1,5);
// Get RSS Feed(s)
include_once(ABSPATH . WPINC . \'/feed.php\');
// Get a SimplePie feed object from the specified feed source.
$rss = fetch_feed($feed_uri);
if (!is_wp_error( $rss ) ) : // Checks that the object is created correctly
//enable order by date
$rss->enable_order_by_date(true);
// Figure out how many total items there are, but limit it to $num_items.
$maxitems = $rss->get_item_quantity($num_items);
// Build an array of all the items, starting with element 0 (first element).
$rss_items = $rss->get_items(0, $maxitems);
endif;
if($echo == 1){
if (count($rss_items) == 0) {
//echo \'<li>No items.</li>\';
echo \'no items\';
} else {
foreach ( $rss_items as $item ) {
//check for excluded posts
if($exclude!=\'\' && $exclude == $item->get_id()){
continue;
}
$featuredImageSrc = $item->get_item_tags(\'\', \'featuredimage\');
$featuredImage = $featuredImageSrc[0][\'data\'];
?>
<?php
/*if($featuredImage) {*/
echo \'<div class="newsItem fromFunctionsPHP \';
if(!$featuredImage) {echo \'noImage \';}
foreach ($item->get_categories() as $category)
{
echo $category->get_label()." ";
/*$imageCat = $category->get_label();
if($imageCat == "Agriculture" || $imageCat == "Food" || $imageCat == "Environment" || $imageCat == "Energy" || $imageCat == "Health" || $imageCat == "People" || $imageCat == "Communities" || $imageCat == "Events") {
break;
} else {
echo "Announcements ";
break;
}*/
}
echo \'"><div class="previousa"><div class="additionalContent">\';
$notdisplayed = true;
if($featuredImage1) {
echo \'<img src="\'.$featuredImage1.\'" alt="" />\';
} else if($featuredImage) {
echo \'<img src="\'.$featuredImage.\'" alt="" />\';
} else {
echo \'<div class="noImageSpacer"></div>\';
/*foreach ($item->get_categories() as $category)
{
$imageCat = $category->get_label();
if($imageCat == "Agriculture") {
echo \'<img src="\';
echo bloginfo(\'template_url\');
echo \'/images/agriculture-pic-\';
echo rand(1,3);
echo \'.jpg" alt=" " />\';
break;
} else if($imageCat == "Food") {
echo \'<img src="\';
echo bloginfo(\'template_url\');
echo \'/images/food-pic-\';
echo rand(1,3);
echo \'.jpg" alt=" " />\';
break;
} else if($imageCat == "Environment") {
echo \'<img src="\';
echo bloginfo(\'template_url\');
echo \'/images/environment-pic-\';
echo rand(1,3);
echo \'.jpg" alt=" " />\';
break;
} else if($imageCat == "Energy") {
echo \'<img src="\';
echo bloginfo(\'template_url\');
echo \'/images/energy-pic-\';
echo rand(1,3);
echo \'.jpg" alt=" " />\';
break;
} else if($imageCat == "Health") {
echo \'<img src="\';
echo bloginfo(\'template_url\');
echo \'/images/health-pic-\';
echo rand(1,3);
echo \'.jpg" alt=" " />\';
break;
} else if ($imageCat == "People" || $imageCat == "Communities") {
echo \'<img src="\';
echo bloginfo(\'template_url\');
echo \'/images/people-pic-\';
echo rand(1,3);
echo \'.jpg" alt=" " />\';
break;
} else if ($imageCat == "Events") {
echo \'<img src="\';
echo bloginfo(\'template_url\');
echo \'/images/twitter-bg-\';
echo rand(1,3);
echo \'.jpg" alt=" " />\';
break;
} else {
echo \'<img src="\';
echo bloginfo(\'template_url\');
echo \'/images/generalcals-bg-\';
echo $i;
echo \'.jpg" alt=" " />\';
if($i < 5) {
$i = $i + 1;
} else {
$i = 1;
}
break;
}
}*/
}
echo \'</div>\';
echo \'<div class="text"><div class="glyph"><div class="symbol"></div></div><div class="titleheading"><h3>\';
$title = $item->get_title();
if($length != -1){
if(strlen($title)>$length){
echo substr($title,0,$length).\'...\'; }
else {
echo $title;
}
} else {
echo $title;
}
echo \'</h3></div><div class="excerpt">\';
$content = $item->get_description();
echo $content;
echo \'</div><div class="dateheading">\';
echo $item->get_date(\'F j, Y\');
echo \'</div><div class="hiddendate">\';
echo "-".$item->get_date(\'Ymd\');
echo \'</div><div class="hiddengroup">\';
$cattemp = $item->get_category();
echo $cattemp->get_label();
echo \'</div><span class="number">10</span></div>\';
echo \'<a href="\';
echo $item->get_permalink();
echo \'" class="highlight" title="\';
echo \'Posted \'.$item->get_date(\'j F Y | g:i a\');
echo \'">Read more about \';
echo $item->get_title();
echo \'<div class="loadingSpinner"><div class="progress"></div></div></a></div></div>\';
/*} else {
//What to display if no image is supplied by the article
echo \'<div class="newsItem noImage \';
foreach ($item->get_categories() as $category)
{
echo $category->get_label()." ";
}
echo \'"><div class="previousa"><div class="titleheading"><h3>\';
$title = $item->get_title();
if($length != -1){
if(strlen($title)>$length){
echo substr($title,0,$length).\'...\'; }
else {
echo $title;
}
} else {
echo $title;
}
echo \'</h3></div><div class="text"><div class="glyph"><div class="symbol"></div></div><div class="excerpt">\';
$content = $item->get_description();
echo $content;
echo \'</div><div class="dateheading">\';
echo $item->get_date(\'F j, Y\');
echo \'</div><div class="hiddendate">\';
echo "-".$item->get_date(\'Ymd\');
echo \'</div><div class="hiddengroup">\';
$cattemp = $item->get_category();
echo $cattemp->get_label();
echo \'</div><span class="number">10</span></div><div class="additionalContent">\';
echo \'</div><a href="\';
echo $item->get_permalink();
echo \'" class="highlight" title="\';
echo \'Posted \'.$item->get_date(\'j F Y | g:i a\');
echo \'">Read more about \';
echo $item->get_title();
echo \'<div class="loadingSpinner"><div class="progress"></div></div></a></div></div>\';
}*/
?>
<?php }
}
} else {
return $rss_items;
}
}
/*function soilsextension_enqueue_scripts(){
$handle = \'soilsextension_scripts\';
$src = get_theme_root_uri() . \'/soilsextension/js/min/master.min.js\';
wp_register_script($handle, $src, false, false, true);
wp_enqueue_script(\'soilsextension_scripts\');
}
add_action(\'wp_enqueue_scripts\', \'soilsextension_enqueue_scripts\'); */
活动插件：这些是我测试期间的活动插件。
Production: 高级自定义字段版本4.3.5(http://www.advancedcustomfields.com/), 自定义帖子类型UI版本0.8.2(http://webdevstudios.com/plugin/custom-post-type-ui/), 事件管理器版本5.5.2(http://wp-events-plugin.com/), WP Super Cache 1.4版(http://wordpress.org/plugins/wp-super-cache/)
Localhost Active plugins: 高级自定义字段版本4.3.4(http://www.advancedcustomfields.com/), 自定义帖子类型UI版本0.8.2(http://webdevstudios.com/plugin/custom-post-type-ui/)
<小时>Attempted Solutions:我尝试了两个案例并记录了结果，试图了解原因。
Case 1.
正在删除函数顶部的html注释。php
Localhost: 不存在“白屏问题”。“媒体库问题”，不存在。
Production: “白屏问题”和“媒体库问题”都存在。
Case 2.
在函数顶部保留html注释。php，但正在删除函数cals\\u feed\\u fetch2
Localhost: 不存在“白屏问题”。存在“媒体文件问题”。
Production: 存在“白屏问题”。存在媒体文件问题
结论：虽然我似乎已经通过删除函数中的所有内容解决了问题。php，我不知道我的原始函数是什么部分。php导致了这些问题。
