wp_ajax_get_attachment()

Ajax handler for getting an attachment.

Source

File: wp-admin/includes/ajax-actions.php 

function wp_ajax_get_attachment() {
	if ( ! isset( $_REQUEST['id'] ) )
		wp_send_json_error();

	if ( ! $id = absint( $_REQUEST['id'] ) )
		wp_send_json_error();

	if ( ! $post = get_post( $id ) )
		wp_send_json_error();

	if ( 'attachment' != $post->post_type )
		wp_send_json_error();

	if ( ! current_user_can( 'upload_files' ) )
		wp_send_json_error();

	if ( ! $attachment = wp_prepare_attachment_for_js( $id ) )
		wp_send_json_error();

	wp_send_json_success( $attachment );
}

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Related

Uses

Uses
Uses Description
wp-includes/media.php: wp_prepare_attachment_for_js()

Prepares an attachment post object for JS, where it is expected to be JSON-encoded and fit into an Attachment model.
wp-includes/capabilities.php: current_user_can()

Whether the current user has a specific capability.
wp-includes/post.php: get_post()

Retrieves post data given a post ID or post object.
wp-includes/functions.php: absint()

Convert a value to non-negative integer.
wp-includes/functions.php: wp_send_json_error()

Send a JSON response back to an Ajax request, indicating failure.
wp-includes/functions.php: wp_send_json_success()

Send a JSON response back to an Ajax request, indicating success.
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Changelog

Changelog
Version Description
WP-3.5.0 Introduced.