PHP/HTML 显示隐藏字符
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PHP/HTML display hidden characters
提问by Matt
So, I have a bunch of code that I'm pulling from a column in MySQL. This code includes hidden characters, such as "\t" and "\n".
所以，我有一堆代码是从 MySQL 的一个列中提取的。此代码包含隐藏字符，例如“\t”和“\n”。
I'm trying to get that raw code to display in a DIV. I was hoping to actually show the hidden characters. I have the following so far, without much luck:
我试图让原始代码显示在 DIV 中。我希望真正显示隐藏的字符。到目前为止，我有以下几点，运气不佳：
<?php
// Simple example: replace all newlines with their character equivalent
$value = str_replace("\n", '\n', $value);
echo htmlentities($value);
Any ideas?
有任何想法吗？
回答by raspi
If you truly want to see everything, use for example this hex dump function. It's good for finding weird UTF-8 (UTF-8 space is not same as ASCII space character and so on) or BOMstuff etc.
如果您真的想查看所有内容，请使用此十六进制转储函数。用于查找奇怪的 UTF-8（UTF-8 空间与 ASCII 空间字符等不同）或BOM等内容。
It outputs like this
它输出这样
0000 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f ........ ........
0010 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f ........ ........
0020 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f !"#$%&' ()*+,-./
0030 30 31 32 33 34 35 36 37 38 39 3a 3b 3c 3d 3e 3f 01234567 89:;<=>?
0040 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f @ABCDEFG HIJKLMNO
0050 50 51 52 53 54 55 56 57 58 59 5a 5b 5c 5d 5e 5f PQRSTUVW XYZ[]^_
0060 60 61 62 63 64 65 66 67 68 69 6a 6b 6c 6d 6e 6f `abcdefg hijklmno
0070 70 71 72 73 74 75 76 77 78 79 7a 7b 7c 7d 7e 7f pqrstuvw xyz{|}~
0080 80 81 82 83 84 85 86 87 88 89 8a 8b 8c 8d 8e 8f ???…?? ?‰????
0090 90 91 92 93 94 95 96 97 98 99 9a 9b 9c 9d 9e 9f ‘'“”?–— ???????
00a0 a0 a1 a2 a3 a4 a5 a6 a7 a8 a9 aa ab ac ad ae af ?￠￡¤￥|§ ¨?a??-?ˉ
00b0 b0 b1 b2 b3 b4 b5 b6 b7 b8 b9 ba bb bc bd be bf °±23′μ?· ?1o?????
00c0 c0 c1 c2 c3 c4 c5 c6 c7 c8 c9 ca cb cc cd ce cf àá?????? èéê?ìí??
00d0 d0 d1 d2 d3 d4 d5 d6 d7 d8 d9 da db dc dd de df D?òó???× ?ùú?üYT?
00e0 e0 e1 e2 e3 e4 e5 e6 e7 e8 e9 ea eb ec ed ee ef àáa????? èéê?ìí??
00f0 f0 f1 f2 f3 f4 f5 f6 f7 f8 f9 fa fb fc fd fe e?òó???÷ ?ùú?üyt
回答by tuergeist
Add shlashes and preserve newline ;)
添加斜杠并保留换行符；)
// Simple example: replace all newlines with their character equivalent
// AND preserve formating (the newline)
$value = str_replace("\n", "\n\n", $value);
$value = str_replace("\t", "\t\t", $value);
echo nl2br(htmlentities($value)); // for HTML as output, with <br/> for newlines
echo "<pre>" . $value . "</pre>"; // for raw, preformated output
if you have
如果你有
$value = "Hi\t\n there";
the result is
结果是
hi\t \n<br>
there
for the html output line.
对于 html 输出行。
回答by brianreavis
Hmm, that should be working... Maybe the newline characters are actually carriage returns? In which case, something like this would be flexible:
嗯，那应该有效......也许换行符实际上是回车？在这种情况下，这样的事情将是灵活的：
// Simple example: replace all newlines with their character equivalent
$value = preg_replace('/[\r\n]+/', '\n', $value);
echo htmlentities($value);
回答by slim
Please note that in PHP "string" and 'string' are actually the same thing.
请注意，在 PHP 中，“string”和“string”实际上是一回事。
htmlentities() just converts quote characters and other special characters to their HTML entity equivalent. See this page
htmlentities() 只是将引号字符和其他特殊字符转换为其等效的 HTML 实体。看这个页面
Escape your slashes and (optionally) enclose the code that you want explicity shown in 'pre' tags. The pre tags are not necessary but can help readability.
转义您的斜线并（可选）将您希望显式显示在“pre”标签中的代码括起来。pre 标签不是必需的，但可以帮助提高可读性。
Here is the code I tested:
这是我测试的代码：
<?php
// Simple example: replace all newlines with their character equivalent
// you will also need to do this for any other special characters as well
$value = "\n";
$value = str_replace("\n", "\n", $value);
$value = "<pre>".$value."</pre>";
echo $value;
?>
回答by DarkThanos
You can try the ­For example : "" it is between the "
您可以尝试­例如：“”它介于“
