php - How do I let a user input a video url and have the video show on the same page upon submit? -

i've seen few similar questions, none of answers have worked me. ideally, user input video url form, hit submit, , video show below form. here's code that's not working (sorry if it's messy or confusing):

<form id="rp_embed_video" name="rp_embed-video" method="post" action="">     <div class="rp_block">         <label><?php printf( __( 'add video link:' ) ); ?></label>         <input type="url" id="rp_newvid" name="rp_newvid" value="" required />     </div>     <div class="rp_block">         <label><?php printf( __( 'choose one:' ) );?></label>         <input type="radio" name="rp_type" value="youtube" required checked />         <input type="radio" name="rp_type" value="vimeo" required />             </div>     <div class="rp_block">         <label><?php _e('title');?></label>         <input type="text" name="rp_title" value="" />     </div>     <div class="rp_block">     <?php $desc_status = (int)get_option('rp_uploader_desc',false);?>         <label><?php _e('description');?><?php if(!$desc_status):?><span>*</span><?php endif;?></label>         <textarea name="rp_desc" <?php if(!$desc_status):?>class="wpvp_require"<?php endif;?>></textarea>     </div>     <div class="rp_block">         <div class="rp_cat" style="float:left;width:50%;">             <label><?php _e('choose category');?></label>             <?php rp_helper::rp_upload_categories_dropdown();?>         </div>         <?php            $hide_tags = get_option('rp_uploader_tags','');         if($hide_tags==''){ ?>         <div class="rp_tag" style="float:right;width:50%;text-align:right;">             <label><?php _e('tags (comma separated)');?></label>             <input type="text" name="rp_tags" value="" />         </div>         <?php            }          ?>     </div>     <input type="hidden" name="rp_action" value="rp_embed" />     <p class="rp_submit_block">         <input type="submit" class="rp-submit" name="rp-embed" value="add video" />     </p> </form>  <?php    if (isset($_post['rp_newvid'])) {        // video url , put in $video variable         $videoid = $_post['rp_newvid'];         $type = $_post['rp_type'];     echo rp_video_embed($_post['rp_newvid'], '720px', '380px', $_post['rp_type']);    } ?>   <?php function rp_video_embed($videoid,$width,$height,$type){         if($type){             if($videoid){                 if($type=='youtube'){                     $embedcode = '<iframe width="'.$width.'" height="'.$height.'" src="http://www.youtube.com/embed/'.$videoid.'" frameborder="0" allowfullscreen></iframe>';                 }                 elseif($type=='vimeo'){                     $embedcode = '<iframe width="'.$width.'" height="'.$height.'" src="http://player.vimeo.com/video/'.$videoid.'" webkitallowfullscreen mozallowfullscreen allowfullscreen frameborder="0"></iframe>';                 }                 $result = $embedcode;             }             else{                 $result = '<span style="color:red;">'._e('no video code found').'</span>';             }         }         else{             $result = '<span style="color:red;">'._e('the video source either not set or not supported').'.</span>';         }         return $result;     }  ?> 

it appears asking user enter url such "www.youtube.com/watch?v=vidid", taking entire string value , inserting <iframe> source value.

this sets source "www.youtube.com/embed/www.youtube.com/watch?v=vidid".

you need parse url submitted user , take vidid value before inserting <iframe>

because of structure of these url's video id last value in string. means "explode" string , take last value in array creates.

here's quick example of how this:

<?php     //sample variables     $youtubeurl = 'www.youtube.com/watch?v=vidid';     $vimeourl = 'https://vimeo.com/vidid';      //test values     $vidurl = $youtubeurl;     $videosource = 'youtube';      //select delimiter based on video source     switch ($videosource) {         case 'youtube':             $delimiter = '=';             break;         case 'vimeo':             $delimiter = '/';             break;         default:             //whatever fallback want     }      //isolate vidid value string     $vidid = end(explode($delimiter, $vidurl)); ?>