Be sure to \? before your ? as that's a special character.

UPDATE adding code 

my @matches = ($content =~ m/(image.php\?id=\d+)/g);

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UPDATE 2 Fixed typo of /? to \? thanks to GrandFather



"Age is nothing more than an inaccurate number bestowed upon us at birth as just another means for others to judge and classify us"

sulfericacid

In reply to Re^2: newbie to regex: all matches by sulfericacid
in thread newbie to regex: all matches by Anonymous Monk

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