我有以下两个数组。我想要这两个数组之间的差异。也就是说，如何找到在这两个数组中都不存在的值？
$array1=Array ( [0] => 64 [1] => 98 [2] => 112 [3] => 92 [4] => 92 [5] => 92 ) ;
$array2=Array ( [0] => 3 [1] => 26 [2] => 38 [3] => 40 [4] => 44 [5] => 46 [6] => 48 [7] => 52 [8] => 64 [9] => 68 [10] => 70 [11] => 72 [12] => 102 [13] => 104 [14] => 106 [15] => 92 [16] => 94 [17] => 96 [18] => 98 [19] => 100 [20] => 108 [21] => 110 [22] => 112);
要获取两个数组之间的差异，您需要执行以下操作：
$fullDiff = array_merge(array_diff($array1, $array2), array_diff($array2, $array1));
之所以如此，是因为array_diff()只会给出在$array1中但不在$array2中的值，而不是相反。上面这个代码将会给出两个数组中不同的值。
注意：此答案将返回$array2中不包含在$array1中的值，而不会返回$array1中不在$array2中的值。
$diff = array_diff($array2, $array1);
function arrayDiffRecursive(array $firstArray,array $secondArray, bool $reverse = false): array
{
$first = 'first';
$second = 'second';
if ($reverse) {
$first = 'second';
$second = 'first';
}
$diff = [];
foreach ($firstArray as $k => $value) {
if (!is_array($value)) {
if (!array_key_exists($k, $secondArray) || $secondArray[$k] != $value) {
$diff[$first][$k] = $value;
$diff[$second][$k] = $secondArray[$k] ?? null;
}
continue;
}
if (!array_key_exists($k, $secondArray) || !is_array($secondArray[$k])) {
$diff[$first][$k] = $value;
$diff[$second][$k] = $secondArray[$k] ?? null;
continue;
}
$newDiff = arrayDiffRecursive($value, $secondArray[$k], $reverse);
if (!empty($newDiff)) {
$diff[$first][$k] = $newDiff[$first];
$diff[$second][$k] = $newDiff[$second];
}
}
return $diff;
}
测试：
$firstArray = ['a' => ['b' => 'c'], 'g' => ['h' => 's']];
$secondArray = ['b' => 'c', 'd' => ['e' => 'f'], 'g' => ['i' => 'j']];
$diffs = array_replace_recursive(
arrayDiffRecursive($firstArray, $secondArray),
arrayDiffRecursive($secondArray, $firstArray, true)
);
print_r($diffs);
输出：
Array
(
[first] => Array
(
[a] => Array
(
[b] => c
)
[g] => Array
(
[h] => s
[i] =>
)
[b] =>
[d] =>
)
[second] => Array
(
[a] =>
[g] => Array
(
[h] =>
[i] => j
)
[b] => c
[d] => Array
(
[e] => f
)
)
)
<?php
function getArrayDiff($a1, $a2) {
$result = array();
print_r($a1);
print_r($a2);
// If First Array is Bigger than Second
if( count($a1) > count($a2) ) {
$result=array_diff($a1,$a2);
}
// If Second Array is Bigger than First
if( count($a1) < count($a2) ) {
$result=array_diff($a2,$a1);
}
// If Both array are same but, data values are different.
else
{
$result = array_merge (array_diff($a2,$a1), array_diff($a1,$a2));
}
return $result;
}
print "<pre>";
// First Array is Big
echo "First Array is Big <br/>";
$a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow");
$a2=array("e"=>"red","f"=>"green","g"=>"blue");
print_r( getArrayDiff($a1, $a2) );
// Second Array is Big
echo "Second Array is Big <br/>";
$a1=array("e"=>"red","f"=>"green","g"=>"blue");
$a2=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow");
print_r( getArrayDiff($a1, $a2) );
// Both Array are same
echo "Both Array are same <br/>";
$a1=array("a"=>"red","b"=>"green","d"=>"yellow");
$a2=array("e"=>"red","f"=>"green","g"=>"blue");
print_r( getArrayDiff($a1, $a2) );
?>
输出：
First Array is Big
Array
(
[a] => red
[b] => green
[c] => blue
[d] => yellow
)
Array
(
[e] => red
[f] => green
[g] => blue
)
Array
(
[d] => yellow
)
Second Array is Big
Array
(
[e] => red
[f] => green
[g] => blue
)
Array
(
[a] => red
[b] => green
[c] => blue
[d] => yellow
)
Array
(
[d] => yellow
)
Both Array are same
Array
(
[a] => red
[b] => green
[d] => yellow
)
Array
(
[e] => red
[f] => green
[g] => blue
)
Array
(
[g] => blue
[d] => yellow
)
如果你要使用array_diff()函数。
需要注意的是参数的书写顺序。
PHP文档：array_diff
# array_diff(1, 2)
array_diff($one, $two);
# array_diff(2, 1)
array_diff($two, $one); // produces different result.
$numbers = range(000000, 999999);
$numbers = array_map(function ($n) {
if (strlen($n) < 6) {
$addZero = 6 - strlen($n);
$appendZero = str_repeat('0', $addZero);
$n = $appendZero . $n;
}
return $n;
}, $numbers);
$allRanges = array_diff($numbers, $getAllPurchasedTicketsArr);
$full_diff = array_diff($array1, $array2) + array_diff($array2, $array1);- dtbarne