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