array_intersect

?

1 2 3 4 5 6 7 8 9

<?php   date_default_timezone_set('Asia/Shanghai');   $a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow"); $a2=array("e"=>"red","f"=>"green","g"=>"blue");   $result=array_intersect($a1,$a2); print_r($result);<br><br>

Array

(

[a] => red

[b] => green

[c] => blue

)