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Description

Builds the Video shortcode output.

This implements the functionality of the Video Shortcode for displaying WordPress mp4s in a post.

Usage

$string|void = wp_video_shortcode( $attr, $content );

Parameters

$attr

( array ) required – { Attributes of the shortcode.

$src

( string ) required – URL to the source of the video file. Default empty.

$height

( int ) required – Height of the video embed in pixels. Default 360.

$width

( int ) required – Width of the video embed in pixels. Default $content_width or 640.

$poster

( string ) required – The 'poster' attribute for the <video> element. Default empty.

$loop

( string ) required – The 'loop' attribute for the <video> element. Default empty.

$autoplay

( string ) required – The 'autoplay' attribute for the <video> element. Default empty.

$muted

( string ) required – The 'muted' attribute for the <video> element. Default false.

$preload

( string ) required – The 'preload' attribute for the <video> element. Default 'metadata'.

$class

( string ) required – The 'class' attribute for the <video> element. Default 'wp-video-shortcode'. }

$content

( string ) optional – Shortcode content.

Returns

string|void HTML content to display video.

Source

File name: wordpress/wp-includes/media.php
Lines:

function wp_video_shortcode( $attr, $content = '' ) {
  global $content_width;
  $post_id = get_post() ? get_the_ID() : 0;

  static $instance = 0;
  ++$instance;

  
/**
 * Filters the default video shortcode output.
 *
 * If the filtered output isn't empty, it will be used instead of generating
 * the default video template.
 *
 * @since 3.6.0
 *
 * @see wp_video_shortcode()
 *
 * @param string $html     Empty variable to be replaced with shortcode markup.
 * @param array  $attr     Attributes of the shortcode. See {@see wp_video_shortcode()}.
 * @param string $content  Video shortcode content.
 * @param int    $instance Unique numeric ID of this video shortcode instance.
 */
  $override = apply_filters( 'wp_video_shortcode_override', '', $attr, $content, $instance );

  if ( '' !== $override ) {
    return $override;
  }

  $video = null;

  $default_types = wp_get_video_extensions();
  $defaults_atts = array(
    'src'      => '',
    'poster'   => '',
    'loop'     => '',
    'autoplay' => '',
    'muted'    => 'false',
    'preload'  => 'metadata',
    'width'    => 640,
    'height'   => 360,
    'class'    => 'wp-video-shortcode',
  );

  foreach ( $default_types as $type ) {
    $defaults_atts[ $type ] = '';
  }

  $atts = shortcode_atts( $defaults_atts, $attr, 'video' );

  if ( is_admin() ) {
    // Shrink the video so it isn't huge in the admin.
    if ( $atts['width'] > $defaults_atts['width'] ) {
      $atts['height'] = round( ( $atts['height'] * $defaults_atts['width'] ) / $atts['width'] );
      $atts['width']  = $defaults_atts['width'];
    }
  } else {
    // If the video is bigger than the theme.
    if ( ! empty( $content_width ) && $atts['width'] > $content_width ) {
      $atts['height'] = round( ( $atts['height'] * $content_width ) / $atts['width'] );
      $atts['width']  = $content_width;
    }
  }

  $is_vimeo      = false;
  $is_youtube    = false;
  $yt_pattern    = '#^https?://(?:www\.)?(?:youtube\.com/watch|youtu\.be/)#';
  $vimeo_pattern = '#^https?://(.+\.)?vimeo\.com/.*#';

  $primary = false;
  if ( ! empty( $atts['src'] ) ) {
    $is_vimeo   = ( preg_match( $vimeo_pattern, $atts['src'] ) );
    $is_youtube = ( preg_match( $yt_pattern, $atts['src'] ) );

    if ( ! $is_youtube && ! $is_vimeo ) {
      $type = wp_check_filetype( $atts['src'], wp_get_mime_types() );

      if ( ! in_array( strtolower( $type['ext'] ), $default_types, true ) ) {
        return sprintf( '<a class="wp-embedded-video" href="%s">%s</a>', esc_url( $atts['src'] ), esc_html( $atts['src'] ) );
      }
    }

    if ( $is_vimeo ) {
      wp_enqueue_script( 'mediaelement-vimeo' );
    }

    $primary = true;
    array_unshift( $default_types, 'src' );
  } else {
    foreach ( $default_types as $ext ) {
      if ( ! empty( $atts[ $ext ] ) ) {
        $type = wp_check_filetype( $atts[ $ext ], wp_get_mime_types() );
        if ( strtolower( $type['ext'] ) === $ext ) {
          $primary = true;
        }
      }
    }
  }

  if ( ! $primary ) {
    $videos = get_attached_media( 'video', $post_id );
 

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