如何比較兩個mysql表php

Question

我有一個電影表，我想比較兩個用戶的普通電影。

 
$array1=array(); 
$array2=array(); 
$query2="select name from movie where user_id='2'"; 
$result2=mysql_query($query2) or die(mysql_error()); 
while($rss = mysql_fetch_assoc ($result2)) 
{ 
    $array1[]=$rss; 
} 
print_r($array1); 

這將打印

Array ([0] => Array ([name] => Snatch) [1] => Array ([name] => The Social Network Movie)
[2] => Array ([name] => Death Note) [3] => Array ([name] => Titanic) 
[4] => Array ([name] => Once Upon a Time in the West))

而對於第二個用戶

$query3="select name from movie where user_id=1"; 
$result3= mysql_query($query3) or die(mysql_error()); 
while($rss1= mysql_fetch_assoc($result3)) 
{ 
    $array2[]=$rss1; 
} 
print_r($array2);

這將打印

Array ([0] => Array ([name] => The Lord of the Rings Trilogy) [1] => Array ([name] => Snatch) 
[2] => Array ([name] => The Social Network Movie) [3] => Array ([name] => Scarface) 
[4] => Array ([name] => Once Upon a Time in the West) [5] => Array ([name] => Legend of the Guardians: The Owls of Ga'Hoole) [6] => Array ([name] => Once Upon a Time in America) 
[7] => Array ([name] => Butch Cassidy and the Sundance Kid) [8] => Array ([name] => Fracture) 
[9] => Array ([name] => Invictus) [10] => Array ([name] => Pride and Glory) [11] => Array ([name] => Casablanca))

當我比較這兩個數組，它給我的第一陣列。

$match= array_intersect($array1, $array2); 
print_r($match);

結果將是

Array ([0] => Array ([name] => Snatch) [1] => Array ([name] => The Social Network Movie)
[2] => Array ([name] => Death Note) [3] => Array ([name] => Titanic) 
[4] => Array ([name] => Once Upon a Time in the West))

但共同的電影有：Snatch , The social network movie , once upon a time in the west

Answer 1

試着寫下面的，而不是

while($rss = mysql_fetch_assoc ($result2)) { $array1[]=$rss['name']; }

這樣陣列中的值將是字符串，而比較容易。我不知道array_intersect是如何處理嵌套數組的，但它對字符串很好用。