在 PHP 中回显新行
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Echo new line in PHP
提问by test123123
<?php
include 'db_connect.php';
$q = mysql_real_escape_string($_GET['q']);
$arr = explode('+', $q);
foreach($arr as $ing)
{
echo $ing;
echo "<br/>";
}
mysql_close($db);
?>
Calling:
调用：
findByIncredients.php?q=Hans+Wurst+Wurstel
Source code HTML:
源代码 HTML：
Hans Wurst Wurstel<br/>
Why is there only one newline?
为什么只有一个换行符？
回答by Jan Zyka
+s in URL are urlencoded spaces. So what php sees in the variable is "Hans Wurst Wurstel". You need to split by space ' ', not +
URL 中的 +s 是 urlencoded 空格。所以php在变量中看到的是“Hans Wurst Wurstel”。您需要按空格 ' ' 分割，而不是 +
arr = explode (' ',$q);
回答by DhruvPathak
"+" gets converted to SPACE on URL decoding. You may want to pass your string as str1-str2-str3 in get parameter.
“+”在 URL 解码时被转换为空格。您可能希望在 get 参数中将字符串作为 str1-str2-str3 传递。
回答by SW4
Try:
尝试：
<?php
include 'db_connect.php';
$q = mysql_real_escape_string($_GET['q']);
$arr = explode (' ',$q);
foreach($arr as $ing)
{
echo $ing;
echo "<br/>";
}
mysql_close($db);
?>
回答by etuardu
Hans+Wurst+Wurstelis the url escaped query string. The php page will likely process it once unescaped (in this case, all +s will be translated into spaces). You should choose a delimiter for explodeaccording to the string as it is in that moment. You can use print_r()for a raw print if you don't know how the string (or any kind of variable) looks like.
Hans+Wurst+Wurstel是 url 转义查询字符串。一旦未转义，php 页面可能会处理它（在这种情况下，所有+s 都将被转换为空格）。您应该explode根据当时的字符串选择一个分隔符。print_r()如果您不知道字符串（或任何类型的变量）的外观，您可以将其用于原始打印。
回答by igorw
Easy. While the standard RFC 3986 url encoding would encode the space " " as "%20", due to historical reasons, it can also be encoded as "+". When PHP parses the query string, it will convert the "+" character to a space.
简单。虽然标准 RFC 3986 url 编码会将空格“”编码为“%20”，但由于历史原因，它也可以编码为“+”。PHP 解析查询字符串时，会将“+”字符转换为空格。
This is also illustrated by the existence of both:
两者的存在也说明了这一点：
- urlencode: equivalent of what PHP uses internally, will convert " " to "+".
- rawurlencode: RFC-conformant encoder, will convert " " to "%20".
- urlencode：相当于 PHP 内部使用的，将“”转换为“+”。
- rawurlencode: 符合 RFC 的编码器，将“”转换为“%20”。
I'm assuming you want to explodeby space. If you really wanted to encode a "+" character, you could use "%2B", which is the rawurlencodeversion and will always work.
我假设你想explode通过空间。如果您真的想对“+”字符进行编码，则可以使用“%2B”，这是rawurlencode版本并且将始终有效。
(EDIT)
（编辑）
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