Forum Discussion
Regarding the problem of -match not updating the $Matches variable after matching
这是我代码的一部分
$Matches = 0
$url_0_0_regex = '(?<=a href="\.\./\.\./\.\./).+?(?=">2<)'
#$url_1_context
#sleep -Seconds 50
$result_bool = $url_1_context -match $url_0_0_regex
if($result_bool ){
$Matches
sleep -Seconds 50
After I set $Matches to 0, and after the -match operation succeeded, I output the value of $Matches, but it still showed 0 instead of the result of a successful match.
According to the document description of the comparison operator, the value of $Matches will be automatically updated after the -match operation is successful. I don't understand what happened in the middle that caused this situation.
I have tried [regex]::, but the result of the Match function of [regex]:: makes me desperate. [regex]:: does not seem to support the use of backward matching in regular expressions. Please help me, thanks a lot!
- $Matches hold the success matches and its a hashtable
maybe the 0 you are getting is the first key of the hashtable
try $Matches.Values
can you provide a string of matching?
- $Matches hold the success matches and its a hashtable
maybe the 0 you are getting is the first key of the hashtable
try $Matches.Values
can you provide a string of matching?Hello, thank you for your reply!
$url_1_context is the html source code of a web page. I use the regular expression $url_0_0_regex to match, and output the value of $Matches by judging the result of -match if($result_bool ), but obviously, the value of $Matches is another- The value after the match operation; it matches another regular expression, but does not match the regular expression represented by $url_0_0_regex.
In addition, it should be noted that the code here is in a function (get_content), and this function (get_content) is called by another function (get_url_name), before calling this function (get_content), once- match operation.
It is possible to obtain the desired result correctly by matching alone; an example is as follows:
$a = '<tr><td align="left"><div class="pages"><a href="javascript:#" class="gray">＜</a><a href="javascript:#" class="gray">上一頁</a><a><U>1</U></a><a href="../../../read.php?tid=4651187&page=2">2</a>' $a -match 'a href="\.\./\.\./\.\./.+?(?=">2<)' $Matches out True Name Value ---- ----- 0 a href="../../../read.php?tid=4651187&page=2So, I guess this may be more related to the scope of the variable, but I cannot change the scope of $Matches. Can the -match operation save the result to other custom variables instead of updating it to the $Matches variable?
I hope I understand your explination, but here are my finding.
The regex example you provide are different and surely they wont match.
Which one are you using '(?<=a href="\.\./\.\./\.\./).+?(?=">2<)' or'a href="\.\./\.\./\.\./.+?(?=">2<)'
I checked the result in regex101.com. The a href="\.\.\/\.\.\/\.\.\/.+?(?=">2<) match the following string a href="../../../read.php?tid=4651187&page=2
and the (?<=a href="\.\.\/\.\.\/\.\.\/).+?(?=">2<) match withread.php?tid=4651187&page=2
So which regex are you using and showing the wrong result.
I think you need to review your regex query, it doesn't matter if you are passing the result from one function to another.
