edit_form_image_editor() WordPress Function

function edit_form_image_editor( $post ) {
	$open = isset( $_GET['image-editor'] );

	if ( $open ) {
		require_once ABSPATH . 'wp-admin/includes/image-edit.php';
	}

	$thumb_url     = false;
	$attachment_id = (int) $post->ID;

	if ( $attachment_id ) {
		$thumb_url = wp_get_attachment_image_src( $attachment_id, array( 900, 450 ), true );
	}

	$alt_text = get_post_meta( $post->ID, '_wp_attachment_image_alt', true );

	$att_url = wp_get_attachment_url( $post->ID );
	?>
	<div class="wp_attachment_holder wp-clearfix">
	<?php

	if ( wp_attachment_is_image( $post->ID ) ) :
		$image_edit_button = '';
		if ( wp_image_editor_supports( array( 'mime_type' => $post->post_mime_type ) ) ) {
			$nonce             = wp_create_nonce( "image_editor-$post->ID" );
			$image_edit_button = "<input type='button' id='imgedit-open-btn-$post->ID' onclick='imageEdit.open( $post->ID, \"$nonce\" )' class='button' value='" . esc_attr__( 'Edit Image' ) . "' /> <span class='spinner'></span>";
		}

		$open_style     = '';
		$not_open_style = '';

		if ( $open ) {
			$open_style = ' style="display:none"';
		} else {
			$not_open_style = ' style="display:none"';
		}

		?>
		<div class="imgedit-response" id="imgedit-response-<?php echo $attachment_id; ?>"></div>

		<div<?php echo $open_style; ?> class="wp_attachment_image wp-clearfix" id="media-head-<?php echo $attachment_id; ?>">
			<p id="thumbnail-head-<?php echo $attachment_id; ?>"><img class="thumbnail" src="<?php echo set_url_scheme( $thumb_url[0] ); ?>" style="max-width:100%" alt="" /></p>
			<p><?php echo $image_edit_button; ?></p>
		</div>
		<div<?php echo $not_open_style; ?> class="image-editor" id="image-editor-<?php echo $attachment_id; ?>">
		<?php

		if ( $open ) {
			wp_image_editor( $attachment_id );
		}

		?>
		</div>
		<?php
	elseif ( $attachment_id && wp_attachment_is( 'audio', $post ) ) :

		wp_maybe_generate_attachment_metadata( $post );

		echo wp_audio_shortcode( array( 'src' => $att_url ) );

	elseif ( $attachment_id && wp_attachment_is( 'video', $post ) ) :

		wp_maybe_generate_attachment_metadata( $post );

		$meta = wp_get_attachment_metadata( $attachment_id );
		$w    = ! empty( $meta['width'] ) ? min( $meta['width'], 640 ) : 0;
		$h    = ! empty( $meta['height'] ) ? $meta['height'] : 0;

		if ( $h && $w < $meta['width'] ) {
			$h = round( ( $meta['height'] * $w ) / $meta['width'] );
		}

		$attr = array( 'src' => $att_url );

		if ( ! empty( $w ) && ! empty( $h ) ) {
			$attr['width']  = $w;
			$attr['height'] = $h;
		}

		$thumb_id = get_post_thumbnail_id( $attachment_id );

		if ( ! empty( $thumb_id ) ) {
			$attr['poster'] = wp_get_attachment_url( $thumb_id );
		}

		echo wp_video_shortcode( $attr );

	elseif ( isset( $thumb_url[0] ) ) :
		?>
		<div class="wp_attachment_image wp-clearfix" id="media-head-<?php echo $attachment_id; ?>">
			<p id="thumbnail-head-<?php echo $attachment_id; ?>">
				<img class="thumbnail" src="<?php echo set_url_scheme( $thumb_url[0] ); ?>" style="max-width:100%" alt="" />
			</p>
		</div>
		<?php

	else :

		/**
		 * Fires when an attachment type can't be rendered in the edit form.
		 *
		 * @since 4.6.0
		 *
		 * @param WP_Post $post A post object.
		 */
		do_action( 'wp_edit_form_attachment_display', $post );

	endif;

	?>
	</div>
	<div class="wp_attachment_details edit-form-section">
	<?php if ( 'image' === substr( $post->post_mime_type, 0, 5 ) ) : ?>
		<p class="attachment-alt-text">
			<label for="attachment_alt"><strong><?php _e( 'Alternative Text' ); ?></strong></label><br />
			<input type="text" class="widefat" name="_wp_attachment_image_alt" id="attachment_alt" aria-describedby="alt-text-description" value="<?php echo esc_attr( $alt_text ); ?>" />
		</p>
		<p class="attachment-alt-text-description" id="alt-text-description">
		<?php

		printf(
			/* translators: 1: Link to tutorial, 2: Additional link attributes, 3: Accessibility text. */
			__( '<a href="%1$s" %2$s>Learn how to describe the purpose of the image%3$s</a>. Leave empty if the image is purely decorative.' ),
			esc_url( 'https://www.w3.org/WAI/tutorials/images/decision-tree' ),
			'target="_blank" rel="noopener"',
			sprintf(
				'<span class="screen-reader-text"> %s</span>',
				/* translators: Accessibility text. */
				__( '(opens in a new tab)' )
			)
		);

		?>
		</p>
	<?php endif; ?>

		<p>
			<label for="attachment_caption"><strong><?php _e( 'Caption' ); ?></strong></label><br />
			<textarea class="widefat" name="excerpt" id="attachment_caption"><?php echo $post->post_excerpt; ?></textarea>
		</p>

	<?php

	$quicktags_settings = array( 'buttons' => 'strong,em,link,block,del,ins,img,ul,ol,li,code,close' );
	$editor_args        = array(
		'textarea_name' => 'content',
		'textarea_rows' => 5,
		'media_buttons' => false,
		'tinymce'       => false,
		'quicktags'     => $quicktags_settings,
	);

	?>

	<label for="attachment_content" class="attachment-content-description"><strong><?php _e( 'Description' ); ?></strong>
	<?php

	if ( preg_match( '#^(audio|video)/#', $post->post_mime_type ) ) {
		echo ': ' . __( 'Displayed on attachment pages.' );
	}

	?>
	</label>
	<?php wp_editor( format_to_edit( $post->post_content ), 'attachment_content', $editor_args ); ?>

	</div>
	<?php

	$extras = get_compat_media_markup( $post->ID );
	echo $extras['item'];
	echo '<input type="hidden" id="image-edit-context" value="edit-attachment" />' . "\n";
}