Question

wp_maybe_generate_attachment_metadata( WP_Post $attachment )

Maybe attempts to generate attachment metadata, if missing.

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description

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参数

$attachment

(WP_Post) (Required) Attachment object.

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源代码

File: wp-includes/media.php

function wp_maybe_generate_attachment_metadata( $attachment ) {
	if ( empty( $attachment ) || ( empty( $attachment->ID ) || ! $attachment_id = (int) $attachment->ID ) ) {
		return;
	}

	$file = get_attached_file( $attachment_id );
	$meta = wp_get_attachment_metadata( $attachment_id );
	if ( empty( $meta ) && file_exists( $file ) ) {
		$_meta = get_post_meta( $attachment_id );
		$regeneration_lock = 'wp_generating_att_' . $attachment_id;
		if ( ! array_key_exists( '_wp_attachment_metadata', $_meta ) && ! get_transient( $regeneration_lock ) ) {
			set_transient( $regeneration_lock, $file );
			wp_update_attachment_metadata( $attachment_id, wp_generate_attachment_metadata( $attachment_id, $file ) );
			delete_transient( $regeneration_lock );
		}
	}
}

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更新日志

Version	description
3.9.0	Introduced.

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相关函数

Uses

• wp-admin/includes/image.php: wp_generate_attachment_metadata()
• wp-includes/option.php: get_transient()
• wp-includes/option.php: set_transient()
• wp-includes/option.php: delete_transient()
• wp-includes/post.php: wp_get_attachment_metadata()
• wp-includes/post.php: wp_update_attachment_metadata()
• wp-includes/post.php: get_post_meta()
• wp-includes/post.php: get_attached_file()
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Used By

• wp-admin/includes/media.php: edit_form_image_editor()

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User Contributed Notes