允许反斜杠正则表达式

Question

I've a function wich replace caracters in PHP :

$texte = preg_replace('`\[math\](.+)\[/math\]`isU', '\( $1 \)', $texte);

But I would allow the \ because my strings look like that : \frac{5}{2 \sqrt{5} } x_{k}

EDIT 1 : For example, the user write the following BBcode : [math] \frac{5}{2 \sqrt{5} } x_{k} [math] it will be translated in HTML by : \( \frac{5}{2 \sqrt{5} } x_{k} \)

EDIT 2 : This is the function :

$result = preg_replace('`\[math\](.*)\[/math\]`isU', '\( $1 \)', $text);

With $text = "[math] \frac{5}{2 \sqrt{5} } x_{k} [/math]"; It returns \( frac{5}{2 sqrt{5} } x_{k} \) The \ has disappeared.

Louis

Answer 1

Finally I found, I have to use

$texte = preg_replace('`\[math\](.*)\[/math\]`isU', '\( $1 \)', $texte);

But I've put this to show $texte : echo'<td>'.BBcode(nl2br(stripslashes(htmlspecialchars($data['post_texte'])))).'

I have just to remove the stripslashes function like this :

echo'<td>'.BBcode(nl2br(htmlspecialchars($data['post_texte']))).'

And it's work fine.