通过使用以下模板创建页面，我解决了自己的问题。只需使用下面的模板创建并访问页面。
您将只使用基本分页查看结果，遵循代码即可轻松查看。在您访问permalink之前，不会保存更改？更新=真
注意事项
Please backup your database first if you decide to use this. It is always best to make trials on a duplicated database.
If you are using shortcodes that produce html output, they will be rendered into the post body. Please change the code accordingly.
此文件使用PHP Simple HTML DOM Parser. 它应位于libs/文件夹中<?php
/**
* Template Name: Util: Replace full sized images with large
*/
?>
<html>
<body>
<style>
body {
font-family: "Arial", sans-serif;
}
a.caution-link {
background: red;
color: white;
text-decoration:none;
display: inline-block;
padding: 3px 5px 3px 5px;
font-weight: bold;
}
a.caution-link:hover {
background: black;
}
</style>
<?php
if (!class_exists(\'Refresh_Full_Sized_Images_With_Large_Action\')) {
/* PHP Simple HTML DOM Parser */
include(\'libs/simple_html_dom.php\');
class Refresh_Full_Sized_Images_With_Large_Action {
public function __construct() {
/* options */
$this->limit = 10;
$this->start = 0;
/* get the posts */
$this->getPosts();
/* do the action */
$this->checkAndUpdatePosts();
}
private function getPosts() {
global $wpdb;
/* only apply if the url parameter "updating" is "true" */
if ( isset($_GET[\'updating\']) && $_GET[\'updating\'] == "true" ) {
$this->isUpdating = true;
echo ("<h1>UPDATED</h1><hr>");
} else {
$this->isUpdating = false;
echo ("<h1 style=\'color:#ccc\'>JUST CHECKING...</h1><hr>");
}
/* set the limit above or you may change this parameter from the url */
if ( isset($_GET[\'limit\']) && is_numeric( $_GET[\'limit\'] ) ) {
$this->limit = $_GET[\'limit\'];
}
if ( isset($_GET[\'start\']) && is_numeric( $_GET[\'start\'] ) ) {
$this->start = $_GET[\'start\'];
}
/* the sql, finding posts having "size full" image tags inside */
$sql = "select ID, post_content, post_title, post_type from $wpdb->posts
WHERE
MATCH(post_content) AGAINST (\'\\"size full wp-image\\"\' IN BOOLEAN MODE) AND
post_type IN(\'post\')
ORDER BY ID DESC
LIMIT {$this->start},{$this->limit}";
/* get results */
$this->foundPosts = $wpdb->get_results($sql);
/* the top links */
$next = $this->start+$this->limit;
$links = "<a href=\'?start=0&limit=$this->limit\'>CHECK FIRST {$this->limit}</a> | ";
$links .= "<a href=\'?start=$next&limit=$this->limit\'>CHECK NEXT {$this->limit}</a> | ";
$links .= "<a href=\'?start=$next&limit=$this->limit&updating=true\' class=\'caution-link\'>NEXT {$this->limit} POSTS + APPLY</a> | ";
$links .= "<a href=\'?start=$this->start&limit=$this->limit&updating=true\' class=\'caution-link\'>APPLY TO THESE</a> <hr>";
echo $links;
}
/* loop found posts and update image attributes if necessary */
private function checkAndUpdatePosts(){
foreach ( $this->foundPosts as $thePost ) {
/* show us a link to check the posts before update and the action link */
echo "<h3><a href=\'",get_permalink($thePost->ID),"\'/ target=\'_blank\'>{$thePost->ID}</a> • {$thePost->post_type} • {$thePost->post_title}</h3>";
$i=0;
$html = str_get_html( apply_filters(\'the_content\', $thePost->post_content ) );
$images = array();
/* go through the images having "size-full" class and update if necessary */
foreach( $html->find(\'img.size-full\') as $image ) {
$imageID = $this->get_img_id_from_url( $image->getAttribute(\'src\') );
$imageWidth = $image->getAttribute(\'width\');
if ( !is_numeric($imageID) ) {
$images[$i][\'n/a\'] = $image->getAttribute(\'src\');
$images[$i][\'width\'] = $imageWidth;
$images[$i][\'returned\'] = $imageID;
$images[$i][\'error\'] = "Not found.";
$isUpdatingCheck = false;
$i++;
continue;
} else {
$isUpdatingCheck = true;
}
$images[$i][\'imageID\'] = $imageID;
$newImg = wp_get_attachment_link( $imageID, \'large\' );
$newImgMetaData = wp_get_attachment_image_src( $imageID, \'large\' );
$images[$i][\'found\'][\'width\'] = $image->getAttribute(\'width\');
$images[$i][\'found\'][\'src\'] = $image->getAttribute(\'src\');
$images[$i][\'found\'][\'escaped_html\'] = esc_html( $image->outertext );
// $images[$i][\'found\'][\'html\'] = $image->outertext;
$images[$i][\'new\'][\'width\'] = $newImgMetaData[1];
$images[$i][\'new\'][\'src\'] = $newImgMetaData[0];
$image->setAttribute(\'src\', $newImgMetaData[0]);
$image->setAttribute(\'width\', $newImgMetaData[1]);
$image->setAttribute(\'height\', $newImgMetaData[2]);
$image->setAttribute(\'class\', str_replace(\'size-full\', \'size-large\', $image->getAttribute(\'class\') ));
$images[$i][\'new\'][\'escaped_html\'] = esc_html( str_replace( \'</img>\',\'\', $image->outertext ) );
// $images[$i][\'new\'][\'html\'] = $image->outertext;
$i++;
}
/* if updating, do the action */
if ( $this->isUpdating && $isUpdatingCheck ) {
$this->updatePost( $thePost->ID, $html->outertext );
}
/* show us some info */
echo \'<pre>\';
print_r($images);
echo \'</pre></hr>\';
}
}
/* find the image id from the url */
private function get_img_id_from_url( $attachment_url = \'\' ) {
global $wpdb;
$imgSQL = "SELECT ID FROM $wpdb->posts WHERE guid = \'{$attachment_url}\'";
$imageID = $wpdb->get_var( $imgSQL );
/* second try, use postmeta table to find the id */
if (!is_numeric($imageID)) {
$findIt = $this->splitn( $attachment_url, \'/\', 5 );
$meta_value = $findIt[1];
$imgSQL = "SELECT post_id FROM $wpdb->postmeta WHERE meta_value = \'{$meta_value}\'";
$imageID = $wpdb->get_var( $imgSQL );
}
return $imageID;
}
/* update the post */
private function updatePost ( $post_id, $post_content ) {
$my_post = array(
\'ID\' => $post_id,
\'post_content\' => $post_content
);
wp_update_post( $my_post );
}
/* split a string from the nth pos */
private function splitn($string, $needle, $offset) {
$newString = $string;
$totalPos = 0;
$length = strlen($needle);
for($i = 0; $i < $offset; $i++)
{
$pos = strpos($newString, $needle);
// If you run out of string before you find all your needles
if($pos === false)
return false;
$newString = substr($newString, $pos+$length);
$totalPos += $pos+$length;
}
return array(substr($string, 0, $totalPos-$length),substr($string, $totalPos));
}
} // class ends
} // if
$theImageUpdater = new Refresh_Full_Sized_Images_With_Large_Action();
?>
</body>
</html>
