问题
I'm having some problems using strip_tags PHP function when the string contains 'less than' and 'greater than' signs. For example:
If I do:
strip_tags("<span>some text <5ml and then >10ml some text </span>");
I'll get:
some text 10ml some text
But, obviously I want to get:
some text <5ml and then >10ml some text
Yes I know that I could use < and >, but I don't have chance to convert those characters into HTML entities since data is already stored as you can see in my example.
What I'm looking for is a clever way to parse HTML in order to get rid only actual HTML tags.
Since TinyMCE was used for generate that data, I know which actual html tags could be used in any case, so a strip_tags($string, $black_list) implementation would be more usefull than strip_tags($string, $allowable_tags).
Any thoughs?
回答1:
As a wacky workaround you could filter non-html brackets with:
$html = preg_replace("# <(?![/a-z]) | (?<=\s)>(?![a-z]) #exi", "htmlentities('$0')", $html);
Apply strip_tags() afterwards. Note how this only works for your specific example and similar cases. It's a regular expression with some heuristics, not artificial intellegince to discern html tags from unescaped angle brackets with other meaning.
回答2:
If you want to have "greater than" and "lesser than" signs, you need to escape them:
> is >
< is <
See e.g. this: http://www.w3schools.com/html/html_entities.asp
回答3:
Instead of strip_tags(), just use htmlspecialchars() instead.
http://php.net/manual/en/function.htmlspecialchars.php
来源：https://stackoverflow.com/questions/4995962/how-to-strip-tags-in-a-safer-way-than-using-strip-tags-function