Php 在回音中有if语句

谁能告诉我如何将if语句包含在这个echo中？我需要我的while语句来继续生成结果，并且我需要一种有效的方法在div类海报之后将if语句插入到这段代码中，有人能给出任何建议吗

while($row = $stmt->fetch(PDO::FETCH_ASSOC)){
echo ' 
<div class="wrapper">
<div class="submissions">
<div class="logo-logo"><h2>Question.</h2>
<div class="checkboxes">'.$row['formtype'].'
</div>

</div>
<div class="top-submit">
&#8220'. $row["actual_quote"] . '&#8221;
</div>
<div class="poster">- '. $row["poster"].'
if(isset($row3['voted'])){
if(isset($row3['ip'])){

    echo "You have already voted for this.";
}
}
else{

    echo "<form action = '' method = 'post'> <input type = 'submit' name = 'like' value = 'like'> <input type = 'submit' name = 'dislike' value = 'dislike'></form>";

}
<div class = "like">

</div>
<div class = "dislike">
</div>
</div>
<!-- use select to get the items to stay on the page-->

</div>
</div>
</div>
';
}

while（$row=$stmt->fetch（PDO:：fetch_ASSOC））{
回声'
问题。
“.$row['formtype']”
“.“$行[“实际”]。”；
-“.$row[“海报”]”
如果（isset（$row3[‘投票’]））{
如果（isset（$row3['ip']））{
echo“你们已经投了赞成票。”；
}
}
否则{
回声“；
}
';
}

您只需将echo分解，并在两者之间包含if语句，例如

echo 'sample content';
if($x=1) 'if statement content';
echo 'more sample content';

您只需在

if

之前“完成”第一次

echo

，然后开始新的一次

替换：

<div class="poster">- '. $row["poster"].'

-”$行[“海报”]。'

与：

-”$第[“海报”]行；

及

与：

echo'

另一种方法是这样使用三元运算符：

echo ('if statement') ? 'value on true' : 'value on false';

---

但是，如果没有简短的语句和值可供响应，则会降低可读性，因此请明智地使用它。

将HTML从PHP逻辑中删除，并放入单独的模板文件：

<div class="wrapper">
    <div class="submissions">
        <div class="logo-logo">
            <h2>Question.</h2>

            <div class="checkboxes">
                <?php echo $row['formtype']; ?>
            </div>
        </div>

        <div class="top-submit">
            &#8220<?php echo $row["actual_quote"]; ?>&#8221;
        </div>

        <div class="poster">
            - <?php echo $row["poster"]; ?>
            <?php echo if(isset($row3['voted'])): ?>
                <?php echo if(isset($row3['ip'])): ?>
                    You have already voted for this.
                <?php endif; ?>
            <?php else: ?>
                <form action = '' method = 'post'> <input type = 'submit' name = 'like' value = 'like'>
                    <input type = 'submit' name = 'dislike' value = 'dislike'>
                </form>
            <?php endif; ?>

            <div class = "like">

            </div>

            <div class = "dislike">

            </div>
        </div>
        <!-- use select to get the items to stay on the page-->

    </div>
</div>

---

我不会使用

echo

输出您的HTML。它使代码更难读写，因为您需要不断记住不要意外关闭报价，更不用说这是一个（小）CPU周期和内存浪费

取而代之的是，脱离php直接流式传输内容，只返回到php中进行逻辑和回显变量。此外，您应该使用来编码您正在回音的内容

我假设

$row3

可能在您的代码中更高，所以我将其单独留给了键

投票

和

ip

。你有一个额外的结束

div

，我把它删除了

<?php
while($row = $stmt->fetch(PDO::FETCH_ASSOC))
{
    ?>
<div class="wrapper">
    <div class="submissions">
        <div class="logo-logo"><h2>Question.</h2>
            <div class="checkboxes"><?php echo htmlentities($row["formtype"]); ?></div>
        </div>
        <div class="top-submit">
            &#8220;<?php echo htmlentities($row["actual_quote"]); ?>&#8221;
        </div>
        <div class="poster">- <?php echo htmlentities($row["poster"]);
    if(isset($row3["voted"]) && isset($row3["ip"]))
    {
        echo "You have already voted for this.";
    }
    else
    {
        ?>
            <form action="" method="post"> <input type="submit" name="like" value="like" /> <input type="submit" name="dislike" value="dislike" /></form>
        <?php
    }
    ?>
            <div class = "like"></div>
            <div class = "dislike"></div>
        </div>
        <!-- use select to get the items to stay on the page-->

    </div>
</div>
    <?php
}

问题。
“”
- 
想象一下，如果你根本无法回应“如果”这个词，因为它会认为你在开始一个if语句。正如其他人所说，您只需要将您的回音分解为几个回音语句。
echo ('if statement') ? 'value on true' : 'value on false';

<div class="wrapper">
    <div class="submissions">
        <div class="logo-logo">
            <h2>Question.</h2>

            <div class="checkboxes">
                <?php echo $row['formtype']; ?>
            </div>
        </div>

        <div class="top-submit">
            &#8220<?php echo $row["actual_quote"]; ?>&#8221;
        </div>

        <div class="poster">
            - <?php echo $row["poster"]; ?>
            <?php echo if(isset($row3['voted'])): ?>
                <?php echo if(isset($row3['ip'])): ?>
                    You have already voted for this.
                <?php endif; ?>
            <?php else: ?>
                <form action = '' method = 'post'> <input type = 'submit' name = 'like' value = 'like'>
                    <input type = 'submit' name = 'dislike' value = 'dislike'>
                </form>
            <?php endif; ?>

            <div class = "like">

            </div>

            <div class = "dislike">

            </div>
        </div>
        <!-- use select to get the items to stay on the page-->

    </div>
</div>

while($row = $stmt->fetch(PDO::FETCH_ASSOC)){
   include __DIR__ . "/form.template.phtml";
}

<?php
while($row = $stmt->fetch(PDO::FETCH_ASSOC))
{
    ?>
<div class="wrapper">
    <div class="submissions">
        <div class="logo-logo"><h2>Question.</h2>
            <div class="checkboxes"><?php echo htmlentities($row["formtype"]); ?></div>
        </div>
        <div class="top-submit">
            &#8220;<?php echo htmlentities($row["actual_quote"]); ?>&#8221;
        </div>
        <div class="poster">- <?php echo htmlentities($row["poster"]);
    if(isset($row3["voted"]) && isset($row3["ip"]))
    {
        echo "You have already voted for this.";
    }
    else
    {
        ?>
            <form action="" method="post"> <input type="submit" name="like" value="like" /> <input type="submit" name="dislike" value="dislike" /></form>
        <?php
    }
    ?>
            <div class = "like"></div>
            <div class = "dislike"></div>
        </div>
        <!-- use select to get the items to stay on the page-->

    </div>
</div>
    <?php
}