Backslashes in code blocks are consumed on every save

supernono
(@supernono)

11 years, 8 months ago
When trying to use backslashes \ within code blocks, they seem to be consumed every time a post is explicitly saved. For example, the following Markdown sample is written before saving:
```
~~~bash
PS1='\\[\33[0m\\]Hello '
~~~
```
When previewing, the output is correct (PS1='\[33[0m\]Hello '). However, after saving the post editor refreshes de text area with the content modified like this:
```
~~~bash
PS1='\[33[\m\]Hello '
~~~
```
Further saves will eat the backslashes once again, in particular, the will be replaced by �.

https://wordpress.org/plugins/jetpack-markdown/

Viewing 9 replies - 1 through 9 (of 9 total)

Thread Starter supernono
(@supernono)

11 years, 8 months ago

Well, funny thing, I cannot write the backslash-zero () sequence in this forum either. Maybe the problem is related.

vidarkongsli
(@vidarkongsli)

11 years, 8 months ago

I experience the exact same problem. WordPress version 3.9.2

vidarkongsli
(@vidarkongsli)

11 years, 8 months ago

Quick workaround: replace backslash characters in your post with the HTML entity & #92;

Thread Starter supernono
(@supernono)

11 years, 8 months ago

That doesn’t work either. Once you save, all the entities are replaced by backslashes. If you edit again we’re back at the beginning of the problem.

vidarkongsli
(@vidarkongsli)

11 years, 8 months ago

You’re right, it does not work 🙁

pcgeek86
(@pcgeek86)

11 years, 8 months ago

I am also having this problem, however I am on WordPress 4.0. Every time you save a WordPress post, the backslashes are destroyed. Now I have to go back and fix all of my posts. 🙁

Please fix if possible. Thanks for the great plug-in.

Cheers,
Trevor Sullivan
Microsoft MVP: PowerShell
My Website

pcgeek86
(@pcgeek86)

11 years, 8 months ago

I sent the author a message on Facebook. Hopefully he sees it.

Cheers,
Trevor Sullivan
Microsoft MVP: PowerShell

404
(@ahspw)

11 years, 8 months ago

Hi everyone,

Sorry for being late. I would love to help you guys, but I don’t have the time.
Kindly notice that I’m not the developer of this plugin. I merely extracted it from Jetpack. You will certainly have better chances fixing this issue, if you post it on Jetpack forums.
If you do post it there, please try not to mention this plugin there! Jetpack developers do not like giving support to “Jetpack spin-offs”.

Good luck.
powerxing
(@powerxing)

11 years, 7 months ago
Hi,

Simply add one line can fix this trouble.

File: jetpack-markdown/lib/markdown/gfm.php
Line: 150
after: $block = esc_html( $block );
add: $block = str_replace(‘\\’, ‘\\\\’, $block);

Like this:
```
public function do_codeblock_preserve( $matches ) {
	$block = stripslashes( $matches[3] );
	$block = esc_html( $block );
	$block = str_replace('\\', '\\\\', $block);
	$open = $matches[1] . $matches[2] . "\n";
	return $open . $block . $matches[4];
}
```
Enjoy~ By: PowerXing