求兩個(gè)數(shù)組的交集問(wèn)題可以使用array_intersect(),array_inersect_assoc,array_intersect_key來(lái)實(shí)現(xiàn)，其中array_intersect()函數(shù)是求兩個(gè)數(shù)的交集，就跟隨百分網(wǎng)小編一起去了解下吧，想了解更多相關(guān)信息請(qǐng)持續(xù)關(guān)注我們應(yīng)屆畢業(yè)生考試網(wǎng)!

返回一個(gè)交集共有元素的數(shù)組（只是數(shù)組值得比較）、array_intersect_assoc()函數(shù)是將鍵值和值綁定，一起比較交集部分、array_intersect_key()函數(shù)是將兩個(gè)數(shù)組的鍵值進(jìn)行比較，返回鍵值交集的數(shù)組。

(相關(guān)資料圖)

但實(shí)際應(yīng)用中也遇到了一些小問(wèn)題，正如下：

實(shí)例：

復(fù)制代碼 代碼如下:

$array = array("red"=>"Red","green"=>"red4","Red15"=>"Red",7=>"Level","Width"=>"Red","azzzz1"=>"art","peak"=>158);

$array1 = array("red"=>"Red2","greena"=>"red","Red15"=>"Red",7=>"Level","Width"=>"Red","azzzz"=>"art","peak"=>158);

$num = array_intersect($array,$array1);

print_r ($num);

echo "
";

$num = array_intersect_assoc($array,$array1);

print_r($num);

echo "
";

$num = array_intersect_key($array,$array1);

print_r ($num);

?>

運(yùn)行結(jié)果：

復(fù)制代碼 代碼如下:

Array ( [red] => Red [Red15] => Red [7] => Level [Width] => Red [azzzz1] => art [peak] => 158 )

Array ( [Red15] => Red [7] => Level [Width] => Red [peak] => 158 )

Array ( [red] => Red [Red15] => Red [7] => Level [Width] => Red [peak] => 158 )

總結(jié)：

1.array_intersect()函數(shù)進(jìn)行的比較只有數(shù)組值的比較，而且存在如”Red“和”Red2“比較時(shí)會(huì)返回"Red"，反之則不會(huì)返回"Red2";

2.array_intersect_assoc()函數(shù)是將數(shù)組的值與鍵值一起比較，而且不會(huì)存在array_intersect的`情況，適用于較嚴(yán)格的比較；

3.array_intersect_key()函數(shù)適用于比較兩個(gè)數(shù)組鍵值的交集，返回的并不只有鍵值，而是鍵值和對(duì)應(yīng)的數(shù)組值。