[英]Regex to replace similar delimiters of strings
I have checked out various Regex answers here on StackOverflow but I can't find anything related to my problem. 我已经在StackOverflow上检查了各种Regex答案,但是找不到与我的问题相关的任何内容。
I have some webpage text (LaTeX actually) of forms $inline_latex$
and $$paragraph_latex$$
and I want to replace them respectively, using PHP with 我有一些网页文本(实际上是LaTeX),格式$inline_latex$
和$$paragraph_latex$$
,我想分别使用PHP替换它们
<span class="latex">\\color{red}inline_latex</span>
and 和
<p class="latex">\\color{red}paragraph_latex</p>
ie replace the delimiters for $ with span tag, and for $$ with paragraph tag. 例如,将$的分隔符替换为span标记,将$$的分隔符替换为段落标记。 Multiple strings will be replaced at once, wherever $
and $$
exist. 只要$
和$$
存在,多个字符串将立即被替换。
What I have tried: I was having a hard time with regex so I used str_replace
three times. 我尝试过的事情:我在使用正则表达式时遇到了麻烦,因此我使用了str_replace
3次。 First one replaces $$
with ~
, second one replaces $
with span
, third one replaces ~
with p
tag. 第一个将$$
替换为~
,第二个将$
替换$
span
,第三个将p
替换为~
。 This is shoddy but it still doesn't work because I don't have a solution for the close tags. 这很伪劣,但仍然无法正常工作,因为我没有close标签的解决方案。 I know using regex / preg_replace is better. 我知道使用regex / preg_replace更好。
Please help? 请帮忙? This is not homework . 这不是功课 。 I am a math instructor designing a simple class exercise webpage, and I am learning PHP. 我是一位数学老师,正在设计一个简单的课堂练习网页,并且正在学习PHP。 Thanks 谢谢
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