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WordPress上传图片自动添加Alt和图像描述

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WordPress上传图片时手动给图片添加替代文本(Alt)和图像描述有些麻烦,可以通过本文的方法自动将图片名称设置为WordPress图像标题、说明和图像描述,如图:

将下面的代码添加到当前主题函数模板functions.php中:

add_action( 'add_attachment', 'my_set_image_meta_upon_image_upload' );
function my_set_image_meta_upon_image_upload( $post_ID ) {
 
// Check if uploaded file is an image, else do nothing
 
if ( wp_attachment_is_image( $post_ID ) ) {
 
$my_image_title = get_post( $post_ID )->post_title;
 
// Sanitize the title: remove hyphens, underscores & extra spaces:
$my_image_title = preg_replace( '%\s*[-_\s]+\s*%', ' ', $my_image_title );
 
// Sanitize the title: capitalize first letter of every word (other letters lower case):
$my_image_title = ucwords( strtolower( $my_image_title ) );
 
// Create an array with the image meta (Title, Caption, Description) to be updated
// Note: comment out the Excerpt/Caption or Content/Description lines if not needed
$my_image_meta = array(
'ID' => $post_ID, // Specify the image (ID) to be updated
'post_title' => $my_image_title, // Set image Title to sanitized title
'post_excerpt' => $my_image_title, // Set image Caption (Excerpt) to sanitized title
'post_content' => $my_image_title, // Set image Description (Content) to sanitized title
);
 
// Set the image Alt-Text
update_post_meta( $post_ID, '_wp_attachment_image_alt', $my_image_title );
 
// Set the image meta (e.g. Title, Excerpt, Content)
wp_update_post( $my_image_meta );
 
}
}

代码可以过滤掉图片名称中的空格等多余元素,对之前上传的图片无效。

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未经允许不得转载:莲花不妖 » WordPress上传图片自动添加Alt和图像描述
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