What is the difference between .*? and .* regular expressions?

regexregex-greedynon-greedy
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Regular expression works on regex101.com, but not on prod

regex
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Regular expression to match non-ASCII characters?

javascriptregexjquery
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Non greedy (reluctant) regex matching in sed?

regexpcreregex-greedysedgreedy
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How to validate an email address in PHP

phpregexemailemail-validation
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