tryphp_func_array_intersect2.php:
<!DOCTYPE html> <html> <body> <?php $a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow"); $a2=array("e"=>"red","f"=>"black","g"=>"purple"); $a3=array("a"=>"red","b"=>"black","h"=>"yellow"); $result=array_intersect($a1,$a2,$a3); print_r($result); ?> </body> </html>
Array ( [a] => red )