Extract specific PHP strings in array based on keywords - php

Question

i have registry data in text as below:
/Classes/CLSID/AppID,SZ,{0010890e-8789-413c-adbc-48f5b511b3af},
/Classes/CLSID/InProcServer32,KEY,,2011-10-14 00:00:33
/Classes/CLSID/InProcServer32/,EXPAND_SZ,%SystemRoot%\x5Csystem32\x5CSHELL32.dll,
/Classes/CLSID/InProcServer32/ThreadingModel,SZ,Apartment,
/Classes/CLSID/,KEY,,2011-10-14 00:00:36
/Classes/CLSID/,SZ,,
/Classes/CLSID/InprocServer32,KEY,,2011-10-14 00:00:36
/Classes/CLSID/InprocServer32/,C:\x5CWINDOWS\x5Csystem32\x5Cmstime.dll,
then i do $registry = explode "\n" and create list of arrays below:
var_dump($registry);
[1]=> string(121) "/Classes/CLSID/AppID,SZ,{0010890e-8789-413c-adbc-48f5b511b3af},"
[2]=> string(139) "/Classes/CLSID/InProcServer32,KEY,,2011-10-14 00:00:33"
[3]=> string(89) "/Classes/CLSID/InProcServer32/,EXPAND_SZ,%SystemRoot%\x5Csystem32\x5CSHELL32.dll,"
[4]=> string(103) "/Classes/CLSID/InProcServer32/ThreadingModel,SZ,Apartment,"
[5]=> string(103) "/Classes/CLSID/,KEY,,2011-10-14 00:00:36"
[6]=> string(121) "/Classes/CLSID/,SZ,,"
[7]=> string(139) "/Classes/CLSID/InprocServer32,KEY,,2011-10-14 00:00:36"
[8]=> string(89) "/Classes/CLSID/InprocServer32/,C:\x5CWINDOWS\x5Csystem32\x5Cmstime.dll,"
i also have keywords in array form
var_dump($keywords);
[1]=> string(12) "Math.dll"
[2]=> string(12) "System.dll"
[3]=> string(12) "inetc.dll"
[4]=> string(12) "time.dll"
i want to show lines in $registry that consist string in $keywords, so i create 1 function below:
function separate($line) {
global $keywords;
foreach ($keywords as $data_filter) {
if (strpos($line, $data_filter) !== false) {
return true;
}
}
return false;
}
$separate = array_filter($registry, 'separate');
since in $keywords consists "time.dll" so the codes produce result as below:
var_dump($seperate);
[1]=> string(89) "/Classes/CLSID/InprocServer32/,C:\x5CWINDOWS\x5Csystem32\x5Cmstime.dll,"
in my case the result is not true because, mstime.dll != time.dll and the information is improper.
the output should be empty.
lets say i replace the "\x5C" as space, there is any function that can do the job? thank you in advance.

Answer 1

There's preg_match.
To go along with the array_filter way you have to do things:
function separate($line) {
global $keywords;
foreach ($keywords as $data_filter) {
// '.' means any character in regex, while '\.' means literal period
$data_filter = str_replace('.', '\.', $data_filter);
if (preg_match("/\\x5C{$data_filter}/", $line)) {
return true;
}
}
return false;
}
This would return false for
/Classes/CLSID/InprocServer32/,C:\x5CWINDOWS\x5Csystem32\x5Cmstime.dll,
but true for
/Classes/CLSID/InprocServer32/,C:\x5CWINDOWS\x5Csystem32\x5Ctime.dll,
If you're not familiar with Regular Expressions, they are awesome and powerful. You can customize mine as needed to suit your situation.