使用python正则表达式查找php字符串连接

Question

I've recently inherited a number of php files that served as email templates. These php files consist of strings concatenated with php variables. I would like to find all the variable names used in the template files so that I'm able to replace these names with the proper tags for Jinja2 templates I'm using now. Here's a snippet from one of the templates:

<?php if($lang == 'EN'){ 
################################# ENGLISH ####################################-->
$html1 = '

Dear '.$firstname.',
<br /><br />
We are contacting you in regards your recent order # '.$custmordernum.'. TO COMPLETE YOUR ORDER WE NEED 
ADDITIONAL INFORMATION FROM YOU.  Your order will be on hold until WE RECEIVE THE FOLLOWING 
}
else { 
################################# SPANISH ####################################-->

I've had limited success using the following regular expression:

(\'.*?\..*?\..*?\')

I'd like to match everything between the periods. Can anyone suggest a better regular expression?

Answer 1

Try /\\.\\$(.*)\\./

I used http://www.solmetra.com/scripts/regex/index.php to try it and I was able to match firstname and custmordernum

Answer 2

如果使用以下内容，则也不必处理句点

(?<=\\.)\\$\\w+?(?=\\.)

Answer 3

Something like this:

text = "$email = 'hello '.$user1_35.' we would like to annoy you '.$Tod-ay.' for 20 minutes.';"
res = re.findall("'\.(\$[\w-]*)\.'", text)
print res #['$user1_35', '$Tod-ay']

Honestly though, you're probably better off going through by hand. This only works for this specific format and doesn't handle variable concatenation at the beginning/end of lines, if there are spaces between periods/quotes/variables, and probably other weird cases.