wp_media_upload_handler(): null|string

Source

function wp_media_upload_handler() {	$errors = array();	$id = 0;	if ( isset( $_POST['html-upload'] ) && ! empty( $_FILES ) ) {	check_admin_referer( 'media-form' );	// Upload File button was clicked.	$id = media_handle_upload( 'async-upload', $_REQUEST['post_id'] );	unset( $_FILES );	if ( is_wp_error( $id ) ) {	$errors['upload_error'] = $id;	$id = false;	}	}	if ( ! empty( $_POST['insertonlybutton'] ) ) {	$src = $_POST['src'];	if ( ! empty( $src ) && ! strpos( $src, '://' ) ) {	$src = "http://$src";	}	if ( isset( $_POST['media_type'] ) && 'image' !== $_POST['media_type'] ) {	$title = esc_html( wp_unslash( $_POST['title'] ) );	if ( empty( $title ) ) {	$title = esc_html( wp_basename( $src ) );	}	if ( $title && $src ) {	$html = "<a href='" . esc_url( $src ) . "'>$title</a>";	}	$type = 'file';	$ext = preg_replace( '/^.+?\.([^.]+)$/', '$1', $src );	if ( $ext ) {	$ext_type = wp_ext2type( $ext );	if ( 'audio' === $ext_type || 'video' === $ext_type ) {	$type = $ext_type;	}	}	/** * Filters the URL sent to the editor for a specific media type. * * The dynamic portion of the hook name, `$type`, refers to the type * of media being sent. * * Possible hook names include: * * - `audio_send_to_editor_url` * - `file_send_to_editor_url` * - `video_send_to_editor_url` * * @since 3.3.0 * * @param string $html HTML markup sent to the editor. * @param string $src Media source URL. * @param string $title Media title. */	$html = apply_filters( "{$type}_send_to_editor_url", $html, sanitize_url( $src ), $title );	} else {	$align = '';	$alt = esc_attr( wp_unslash( $_POST['alt'] ) );	if ( isset( $_POST['align'] ) ) {	$align = esc_attr( wp_unslash( $_POST['align'] ) );	$class = " class='align$align'";	}	if ( ! empty( $src ) ) {	$html = "<img src='" . esc_url( $src ) . "' alt='$alt'$class />";	}	/** * Filters the image URL sent to the editor. * * @since 2.8.0 * * @param string $html HTML markup sent to the editor for an image. * @param string $src Image source URL. * @param string $alt Image alternate, or alt, text. * @param string $align The image alignment. Default 'alignnone'. Possible values include * 'alignleft', 'aligncenter', 'alignright', 'alignnone'. */	$html = apply_filters( 'image_send_to_editor_url', $html, sanitize_url( $src ), $alt, $align );	}	return media_send_to_editor( $html );	}	if ( isset( $_POST['save'] ) ) {	$errors['upload_notice'] = __( 'Saved.' );	wp_enqueue_script( 'admin-gallery' );	return wp_iframe( 'media_upload_gallery_form', $errors );	} elseif ( ! empty( $_POST ) ) {	$return = media_upload_form_handler();	if ( is_string( $return ) ) {	return $return;	}	if ( is_array( $return ) ) {	$errors = $return;	}	}	if ( isset( $_GET['tab'] ) && 'type_url' === $_GET['tab'] ) {	$type = 'image';	if ( isset( $_GET['type'] ) && in_array( $_GET['type'], array( 'video', 'audio', 'file' ), true ) ) {	$type = $_GET['type'];	}	return wp_iframe( 'media_upload_type_url_form', $type, $errors, $id );	}	return wp_iframe( 'media_upload_type_form', 'image', $errors, $id ); } 

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