php 如何php if else语句并返回不同的div？
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How to php if else statement and return different divs?
提问by tokyowp
I'm trying to create an if-else statement, that will return different divs. I believe it is failing because there are too many 'in the else statement.
我正在尝试创建一个 if-else 语句，它将返回不同的 div。我认为它失败了，因为'else 语句中的内容太多。
<?php $blogentryid = get_the_ID();
if ($blogentryid=="1572") {
echo '<div>Hello</div>'
}
else {
echo '<div class="socialnews2"><!-- start div social-->
<div class="twitternews2">
<a href="http://twitter.com/share" class="twitter-share-button" data-count="horizontal" data-text="<?php the_title(); ?>" d
ata-url="<?php the_permalink() ?>" data-via="giantmangocom">Tweet</a>
<script type="text/javascript">
//async script, twitter button fashiolista.com style
(function() {
var s = document.createElement('SCRIPT');
var c = document.getElementsByTagName('script')[0];
s.type = 'text/javascript';
s.async = true;
s.src = 'http://platform.twitter.com/widgets.js';
c.parentNode.insertBefore(s, c);
})();
</script>
</div>
</div>
<div class="facebooknews2">
<iframe src="http://www.facebook.com/plugins/like.php?href=<?php echo urlencode(get_permalink($post->ID)); ?>&layout=button_count&
amp;show_faces=false&width=80&action=like&colorscheme=light;height=21"" scrolling="no" frameborder="0" style="border:none; overflow:hidden; wid
th:80px; height:21px;" allowTransparency="true"></iframe>
</div>'
}
?>
回答by mellamokb
When you want to show conditional content, open and close the <?phptags instead of using echo statements.
当您想要显示条件内容时，请打开和关闭<?php标签而不是使用 echo 语句。
<?php if ($blogentryid == "1572") { ?>
<div>Hello</div>
<?php } else { ?>
<div class="socialnews2"><!-- start div social-->
... rest of content here
<? } ?>
It will also ensure that your php code inside of the div gets evaluated as you intended.
它还将确保您在 div 中的 php 代码按照您的意图进行评估。
回答by Mauro
you cannot have a <?php ?>tag inside a <?php ?>tag.
<?php ?>标签内不能有<?php ?>标签。
<?php .. data-text="<?php the_title(); ?>" ...?>
maybe do something like this:
也许做这样的事情：
<?php echo '... data-text="'; echo the_title(); echo '...'; ?>
回答by Chris Baker
This code is all over the place.
这段代码无处不在。
At the end of every line of executable code, you must have a semi-colon (";") before the syntax is considered valid. When you're trying to assemble PHP plus HTML, it isn't necessary to echo everything. Here's a cleaned up version of your code below.
在每一行可执行代码的末尾，必须有一个分号 (";")，然后才能认为语法有效。当您尝试组合 PHP 和 HTML 时，没有必要回显所有内容。这是下面代码的清理版本。
As you can see, when you don't need any PHP logic, you can end php with ?>and return to normal HTML. You seemed to have that idea, but you contained it all in an echostatement. That would have worked, but you had some <?php echo $whatever; ?>statements mixed in. Take a look at the cleaned up code I posted and you should be able to see where you were going wrong.
如您所见，当您不需要任何 PHP 逻辑时，您可以结束 php?>并返回正常的 HTML。你似乎有这个想法，但你把它全部包含在一个echo声明中。那会奏效，但是您<?php echo $whatever; ?>混入了一些语句。看看我发布的清理过的代码，您应该能够看到哪里出错了。
<?php
$blogentryid = get_the_ID();
if ($blogentryid=="1572") {
echo '<div>Hello</div>';
} else {
?>
<div class="socialnews2"><!-- start div social-->'
<div class="twitternews2">
<a href="http://twitter.com/share" class="twitter-share-button" data-count="horizontal" data-text="<?php the_title(); ?>" data-url="<?php the_permalink() ?>" data-via="giantmangocom">
Tweet
</a>
<script type="text/javascript">
//async script, twitter button fashiolista.com style
(function() {
var s = document.createElement('SCRIPT');
var c = document.getElementsByTagName('script')[0];
s.type = 'text/javascript';
s.async = true;
s.src = 'http://platform.twitter.com/widgets.js';
c.parentNode.insertBefore(s, c);
})();
</script>
</div>
<div class="facebooknews2">
<iframe src="http://www.facebook.com/plugins/like.php?href=<?php echo urlencode(get_permalink($post->ID)); ?>&layout=button_count&show_faces=false&width=80&action=like&colorscheme=light;height=21"" scrolling="no" frameborder="0" style="border:none; overflow:hidden; width:80px; height:21px;" allowTransparency="true"></iframe>
</div>
</div>
<?php
} // end :: if
?>
回答by Chris Thompson
For multiline strings that are as complex as the one you are suggesting, I would suggest simply ending your php block before the output. For instance:
对于像您建议的那样复杂的多行字符串，我建议在输出之前简单地结束您的 php 块。例如：
<?php
if($outputDiv1){?>
<div id="1">Plain old unescaped html code</div>
<?php }else{ //output div 2 ?>
<div id="2">More html</div>
<?php } ?>
I find this method is far easier. If you need at access a php variable from within the html, you simply open up another php block like <input name="name" type="text" value="<?php echo $someVal; ?>" />
我发现这种方法要容易得多。如果您需要从 html 中访问 php 变量，您只需打开另一个 php 块，如<input name="name" type="text" value="<?php echo $someVal; ?>" />
回答by Marc B
The 'in your javascript sections need to be escaped: \', otherwise they'll be seen by PHP as the end of the string you're echoing.
将'在JavaScript的部分需要进行转义：\'，否则他们将通过PHP被看作是你呼应字符串的结尾。
For large blobs of text like that, look into HEREDOCs, which allow you to output multi-line strings without any worries about quote escaping.
对于像这样的大块文本，请查看HEREDOCs，它允许您输出多行字符串而无需担心引号转义。
As well, you can't embed php blocks within strings as you are:
同样，您不能像这样在字符串中嵌入 php 块：
echo 'hello<?php echo "there" ?>'
will not work.
不管用。
