W3School TIY Editor
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<!DOCTYPE html> <html> <body> <?php $a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow"); $a2=array("a"=>"red","b"=>"green","g"=>"blue"); $a3=array("a"=>"red","b"=>"green","g"=>"blue"); $result=array_intersect_assoc($a1,$a2,$a3); print_r($result); ?> </body> </html>