引号 [英] Quoting quotation marks
问题描述
有人对此有想法吗?
我要为此付出一点努力:
I'm going a bit bats working on this:
$toReturn .= "
function addProd(pExists)
{
document.getElementById('products').innerHTML = \"<tr><td id='prod_n'><input type='text' size='10' maxlength='10' name='proj_n' id='prod_n' onchange=".chr(92).chr(34)."saveData(setSaveParams('ajaxSaveDataController.php', 'PROD', 'n'), this.value)".chr(92).chr(34)." value='";
$toReturn .="'></td>
<td id='prod_spec'> <textarea cols='60' name='prod_spec' id='prod_spec' rows='20' onchange=".chr(92).chr(34)."saveData(setSaveParams('ajaxSaveDataController.php', 'PROD', 'prod_spec'), this.value)".chr(92).chr(34)." value='";
$toReturn .="'></td></tr>\" + document.getElementById('prodsTab').innerHTML;
if (pExists == 0)
{
document.getElementById('prodsTab').innerHTML = \"<tr><th id='proj_spec_h'>Name</td><th id='proj_spec_h'>Spec</td></tr>\" + document.getElementById('prodsTab').innerHTML;";
我已经转录过了，所以不用担心过多的错别字.
I've transcribed that so don't worry overmuch about an off topic typo.
这里发生的是我正在使用PHP编写调用Ajax函数的Javascript，而让我大吃一惊的是" s和' s
What's going on here is I'm using PHP to write Javascript that calls an Ajax function, and what's blowing me away is the "s and the 's
所以我正在用PHP写一个返回字符串，所以所有内容都在"
So I'm writing a return string, in PHP, so all that's in "
然后我要编写一些innerHTML，以便可以放入\"
Then I want to write some innerHTML, so that I can put inside \"
然后HTML参数可以在'
Then the HTML arguments can be in '
到目前为止一切都很好.
All's fine so far.
因此，我的onchange呼叫应该以onchange="function('a', 'b')"结尾，那么，我的"将从哪里来?如果使用"，它将结束PHP字符串.如果我使用\"，则会结束innerHTML字符串.所以我最终得到PHP来解释chr(92).chr(34)
So then my onchange call is supposed to end up as onchange="function('a', 'b')", well, where are my "s going to come from? If I use " that'll end the PHP string. If I use \" that'll end the innerHTML string. So I ended up getting PHP to interpret this chr(92).chr(34)
所以这很乱，开始伤到我的头.
So that's very messy and it's starting to hurt my head.
现在，它在第二个$toReturn之后的空白行上失败了，我希望在那里保持可读性.
And now it's failing on that blank line after the second $toReturn, which I wanted there for readability.
我在风格或某些方面一定做错了.
I must be doing something wrong in terms of style or, something.
您如何处理嵌套的"?
推荐答案
考虑使用HEREDOC语法. http://www.php .net/manual/en/language.types.string.php#language.types.string.syntax.heredoc
Consider using the HEREDOC syntax. http://www.php.net/manual/en/language.types.string.php#language.types.string.syntax.heredoc
<?php
$my_string = <<<EOD
<script type="text/javascript">
var x = "this string has a ' known as a single quote!";
</script>
EOD;
?>
此语法的优点是能够自由编写您的html或javascript，而无需转义引号.
The advantage with this syntax is being able to freely write your html or javascript without escaping quotes.
更新
有关HEREDOC的更多信息.
Here is a little more info on HEREDOC.
首先，与Heredoc语法相关的最常见错误是由空格引起的. HEREDOC语法需要打开和关闭标识符.在上面的示例中，我已使用EOD作为标识符.重要的是，开头标识符后面没有空格，并且结尾标识符在新行上，前面没有空格，并且标识符和分号之间没有空格.
First and foremost the most common error related to heredoc syntax is caused by whitespace. HEREDOC syntax requires an opening and closing identifier. In the example above I have used EOD as the identifier. It is important that the opening identifier has no whitespace after it and the closing identifier is on a new line, has no whitespace before it and no whitespace between the identifier and the semi-colon.
您不必使用EOD作为标识符.您可以使用更具描述性的内容.
我喜欢使用描述代码块的标识符.
You do not have to use EOD as your identifier. You can use something more descriptive.
I like to use an identifier that describes the block of code.
<?php
$html = <<<HTML
<html>
<head>
<title>Example html</title>
</head>
<body>
<p class="paragraph">This is my html!</p>
</body>
</html>
HTML;
$javascript = <<<JAVASCRIPT
<script type="text/javascript">
var helloText = "Hello, my name is Jrod";
alert(helloText);
</script>
JAVASCRIPT;
?>
要在Heredoc语法中使用变量，您将需要在代码中的变量周围使用花括号.
To use variables inside your heredoc syntax you will need to use curly braces around your variable in the code.
$widget = <<<WIDGET
<p>Good Morning {$name}</p>
WIDGET;
这篇关于引号的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
