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<?php
// guarantee use of https
wp_oembed_remove_provider( '#https?://(www\.)?slideshare\.net/.*#i' );
wp_oembed_add_provider( '#https?://(www\.)?slideshare\.net/.*#i', 'https://www.slideshare.net/api/oembed/2', true );
/*
* Slideshare shortcode format:
* Old style (still compatible): [slideshare id=5342235&doc=camprock-101002163655-phpapp01&w=300&h=200]
* New style: [slideshare id=5342235&w=300&h=200&fb=0&mw=0&mh=0&sc=no]
*
* Legend:
* id = Document ID provided by Slideshare
* w = Width of iFrame (int)
* h = Height of iFrame (int)
* fb = iFrame frameborder (int)
* mw = iFrame marginwidth (int)
* mh = iFrame marginheight (int)
* sc = iFrame Scrollbar (yes/no)
**/
add_shortcode( 'slideshare', 'slideshare_shortcode' );
function slideshare_shortcode( $atts ) {
global $content_width;
$params = shortcode_new_to_old_params( $atts );
parse_str( $params, $arguments );
if ( empty( $arguments ) )
return '<!-- SlideShare error: no arguments -->';
extract( $arguments );
// check that the Slideshare ID contains letters, numbers and query strings
$pattern = '/[^-_a-zA-Z0-9?=&]/';
if ( empty( $id ) || preg_match( $pattern, $id ) )
return '<!-- SlideShare error: id is missing or has illegal characters -->';
// check the width/height
if ( empty( $w ) && ! empty( $content_width ) )
$w = intval( $content_width );
elseif ( ! ( $w = intval( $w ) ) || $w < 300 || $w > 1600 )
$w = 425;
else
$w = intval( $w );
$h = ceil( $w * 348 / 425 );
if ( isset( $pro ) ) {
$source = "https://www.slideshare.net/slidesharepro/$id";
} else {
$source = "https://www.slideshare.net/slideshow/embed_code/$id";
}
if ( isset( $rel ) )
$source = add_query_arg( 'rel', intval( $rel ), $source );
if ( isset( $startSlide ) )
$source = add_query_arg( 'startSlide', intval( $startSlide ), $source );
$player = sprintf( "<iframe src='%s' width='%d' height='%d'", esc_url( $source ), $w, $h );
// check the frameborder
if ( isset( $fb ) )
$player .= " frameborder='" . intval( $fb ) . "'";
// check the margin width; if not empty, cast as int
if ( isset( $mw ) )
$player .= " marginwidth='" . intval( $mw ) . "'";
// check the margin height, if not empty, cast as int
if ( isset( $mh ) )
$player .= " marginheight='" . intval( $mh ) . "'";
if ( ! empty( $style ) )
$player .= " style='" . $style . "'";
// check the scrollbar; cast as a lowercase string for comparison
$sc = isset( $sc ) ? strtolower( $sc ) : '';
if ( in_array( $sc, array( 'yes', 'no' ) ) )
$player .= " scrolling='" . $sc . "'";
$player .= ' allowfullscreen webkitallowfullscreen mozallowfullscreen></iframe>';
return $player;
}
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