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Please post in as much detail as you can what your attempting to do with a sample string and I will try and help.
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Please post in as much detail as you can what your attempting to do with a sample string and I will try and help.

tmajor99

Web Developer, specialising in WordPress

Terry Woods

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Not sure if this possible but is there a way for regular expression to remove everything in a string except for certain words? &nbsp;<br />
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Data &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Result<br />
--------------------- &nbsp; &nbsp; &nbsp; &nbsp; -------------<br />
1.2 GPM &nbsp;Test &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;GPH<br />
LPH &nbsp; 999 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;LPH<br />
ZZ gps (test) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; gps
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Not sure if this possible but is there a way for regular expression to remove everything in a string except for certain words?  

Data                           Result
---------------------         -------------
1.2 GPM  Test          GPH
LPH   999                  LPH
ZZ gps (test)             gps

Regular Expression to only extract certain words from a string

A regular expression ("regex") is a sequence of characters that define a search pattern, mainly for use in pattern matching with strings, or string matching, i.e. "find and replace"-like operations. Regular expression processors are found in several search engines, search and replace dialogs of several word processors and text editors, and in the command lines of text processing utilities, such as sed and AWK. Many programming languages provide regular expression capabilities, some built-in, for example Perl, JavaScript, Ruby, AWK, and Tcl, and others via a standard library, for example .NET languages, Java, Python and C++ (since C++11). Most other languages offer regular expressions via a library.