我有以下代码：
<div class="video-embed" style="margin-top: 0px; z-index:102; margin-bottom: 0px;">
<?php
$url1 = get_post_meta( $post->ID , \'video_play\' , true );
$search = \'#(.*?)(?:href="https?://)?(?:www\\.)?(?:youtu\\.be/|youtube\\.com(?:/embed/|/v/|/watch?.*?v=))([\\w\\-]{10,12}).*#x\';
$replace = \'http://www.youtube.com/embed/$2\';
$url = preg_replace($search,$replace,$url1);
?>
<iframe width="560" height="315" src="<?php echo $url; ?>" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>
</div>
现在我需要实现功能。。。
如果video\\u play为空，请尝试获取video\\u stop$url1 = get_post_meta( $post->ID , \'video_stop\' , true );, 如果video\\u play和video\\u stop为空，则显示文本“此视频已删除”。
最合适的回答,由SO网友:Bikash Waiba 整理而成
您可以使用if-else：
<div class="video-embed" style="margin-top: 0px; z-index:102; margin-bottom: 0px;">
<?php
$url1 = get_post_meta( $post->ID , \'video_play\' , true ) ?: get_post_meta( $post->ID , \'video_stop\' , true ) ?: false;
if( $url1 ):
$search = \'#(.*?)(?:href="https?://)?(?:www\\.)?(?:youtu\\.be/|youtube\\.com(?:/embed/|/v/|/watch?.*?v=))([\\w\\-]{10,12}).*#x\';
$replace = \'http://www.youtube.com/embed/$2\';
$url = preg_replace($search,$replace,$url1);
?>
<iframe width="560" height="315" src="<?php echo $url; ?>" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>
<?php
else:
echo "This video is removed";
endif;
?>
</div>
SO网友:MLL
以上答案是正确的，如果用户登录以进行video\\u stop，则只需添加。
<div class="video-embed" style="margin-top: 0px; z-index:102; margin-bottom: 0px;">
<?php
if ( is_user_logged_in() ) {
$url1 = get_post_meta( $post->ID , \'video_play\' , true ) ?: get_post_meta( $post->ID , \'video_stop\' , true ) ?: false;
} else {
$url1 = get_post_meta( $post->ID , \'video_play\' , true ) ?: false;
}
if( $url1 ):
$search = \'#(.*?)(?:href="https?://)?(?:www\\.)?(?:youtu\\.be/|youtube\\.com(?:/embed/|/v/|/watch?.*?v=))([\\w\\-]{10,12}).*#x\';
$replace = \'http://www.youtube.com/embed/$2\';
$url = preg_replace($search,$replace,$url1);
?>
<iframe width="560" height="315" src="<?php echo $url; ?>" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>
<?php
else:
echo \'<div id="removed" style="
left: 0px;
right: 0px;
background: #111;
position: relative;
padding-bottom: 56.25%;
padding-top: 0px;
height: 0;
text-align: center;
"><p style="position: absolute;
top: 45%;
left: 0;
width: 100%;
height: auto;
font-size: 25px;
color: white;
font-weight: bold;">
Video is removed!
</a></p></div>\';
endif;
?>
</div>
