Multiple preg_match regex on title or description

Google has several restricted items.  I need to use regex to detect these items and flag them so they are not entered in the google shopping feed.  I can do one, I just cannot get several to work together.

example:
$a = 'Do you have any guns, knives, scopes, magazines,?';

if (preg_match('/guns/','/knives/,/scopes/,/magazine/,$a))  
    echo 'true';

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lawrence_devAsked:
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gr8gonzoConsultantCommented:
1. Use the Regex Coach to build out your regular expressions. It's a free utility and you can see your results instantly as you type. I know regexes pretty well and still use it all the time.

2. You can group matching options like this:
(?:apples|oranges|bananas)

That will match apples OR oranges OR bananas.

if (preg_match('/(?:guns|knives|scopes|magazine)/,$a))

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käµfm³d 👽Commented:
You'll want to include word boundaries ( \b ) in gr8gonzo's suggestion. Otherwise, things like "shoguns" and "periscopes" will be matched as well--unless that's the behavior you want.

e.g.

if (preg_match('/\b(?:guns|knives|scopes|magazine)\b/,$a))

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lawrence_devAuthor Commented:
Thank You!!
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