我想检查两个数组是否相等。我的意思是:相同的大小，相同的索引，相同的值。我该怎么做呢?
根据用户的建议使用!==，如果数组中至少有一个元素是不同的，我希望下面的代码会打印enter，但实际上并不是这样。
if (($_POST['atlOriginal'] !== $oldAtlPosition)
or ($_POST['atl'] !== $aext)
or ($_POST['sidesOriginal'] !== $oldSidePosition)
or ($_POST['sidesOriginal'] !== $sideext)) {
echo "enter";
}
当前回答
另一种不考虑值顺序检查是否相等的方法使用http://php.net/manual/en/function.array-intersect.php，如下所示:
$array1 = array(2,5,3);
$array2 = array(5,2,3);
if($array1 === array_intersect($array1, $array2) && $array2 === array_intersect($array2, $array1)) {
echo 'Equal';
} else {
echo 'Not equal';
}
下面是一个使用http://php.net/manual/en/function.array-uintersect.php:也可以用于多维数组的版本
$array1 = array(
array(5, 2),
array(3, 6),
array(2, 9, 4)
);
$array2 = array(
array(3, 6),
array(2, 9, 4),
array(5, 2)
);
if($array1 === array_uintersect($array1, $array2, 'compare') && $array2 === array_uintersect($array2, $array1, 'compare')) {
echo 'Equal';
} else {
echo 'Not equal';
}
function compare($v1, $v2) {
if ($v1===$v2) {
return 0;
}
if ($v1 > $v2) return 1;
return -1;
}
其他回答
简单的解决方案，即使是数组的键以不同的顺序给出:
public static function arrays_are_equal($array1, $array2)
{
array_multisort($array1);
array_multisort($array2);
return ( serialize($array1) === serialize($array2) );
}
下面是如何比较数组并获得它们之间的不同之处的示例。
$array1 = ['1' => 'XXX', 'second' => [
'a' => ['test' => '2'],
'b' => 'test'
], 'b' => ['no test']];
$array2 = [
'1' => 'XX',
'second' => [
'a' => ['test' => '5', 'z' => 5],
'b' => 'test'
],
'test'
];
function compareArrayValues($arrayOne, $arrayTwo, &$diff = [], $reversed = false)
{
foreach ($arrayOne as $key => $val) {
if (!isset($arrayTwo[$key])) {
$diff[$key] = 'MISSING IN ' . ($reversed ? 'FIRST' : 'SECOND');
} else if (is_array($val) && (json_encode($arrayOne[$key]) !== json_encode($arrayTwo[$key]))) {
compareArrayValues($arrayOne[$key], $arrayTwo[$key], $diff[$key], $reversed);
} else if ($arrayOne[$key] !== $arrayTwo[$key]) {
$diff[$key] = 'DIFFERENT';
}
}
}
$diff = [];
$diffSecond = [];
compareArrayValues($array1, $array2, $diff);
compareArrayValues($array2, $array1, $diffSecond, true);
print_r($diff);
print_r($diffSecond);
print_r(array_merge($diff, $diffSecond));
结果:
Array
(
[0] => DIFFERENT
[second] => Array
(
[a] => Array
(
[test] => DIFFERENT
[z] => MISSING IN FIRST
)
)
[b] => MISSING IN SECOND
[1] => DIFFERENT
[2] => MISSING IN FIRST
)
另一种不考虑值顺序检查是否相等的方法使用http://php.net/manual/en/function.array-intersect.php，如下所示:
$array1 = array(2,5,3);
$array2 = array(5,2,3);
if($array1 === array_intersect($array1, $array2) && $array2 === array_intersect($array2, $array1)) {
echo 'Equal';
} else {
echo 'Not equal';
}
下面是一个使用http://php.net/manual/en/function.array-uintersect.php:也可以用于多维数组的版本
$array1 = array(
array(5, 2),
array(3, 6),
array(2, 9, 4)
);
$array2 = array(
array(3, 6),
array(2, 9, 4),
array(5, 2)
);
if($array1 === array_uintersect($array1, $array2, 'compare') && $array2 === array_uintersect($array2, $array1, 'compare')) {
echo 'Equal';
} else {
echo 'Not equal';
}
function compare($v1, $v2) {
if ($v1===$v2) {
return 0;
}
if ($v1 > $v2) return 1;
return -1;
}
如果你想生成一份详细的报告，你可以使用这样的东西:
function deepCompare(Array $a, Array $b, string $parentAKey, string $parentBKey, bool $compareInverted = true, bool $compareValues = true, string $log = '')
{
foreach ($a as $aKey => $aValue) {
$fullAKey = implode('.', [$parentAKey, $aKey]);
$fullBKey = implode('.', [$parentBKey, $aKey]);
if (! isset($b[$aKey])) {
$log .= "⍰ {$fullAKey} has no equivalent {$fullBKey}\n";
} else {
$bValue = $b[$aKey];
if (is_array($aValue)) {
$log = deepCompare($aValue, $bValue, $fullAKey, $fullBKey, false, $compareValues, $log);
} else {
if ($compareValues) {
if ($aValue != $bValue) {
$log .= "≠ {$fullAKey} value differs from {$fullBKey}\n";
}
}
}
}
}
if ($compareInverted) {
$log = deepCompare($b, $a, $parentBKey, $parentAKey, false, false, $log);
}
return $log;
}
下面是一个例子:
$november = [
'site1' => [
'id' => 15,
'name' => 'Brazil',
'extendedHours' => 454,
],
'site2' => [
'id' => 43,
'name' => 'Portugal',
'extendedHours' => 448,
],
'site3' => [
'id' => 49,
'name' => 'Spain',
'extendedHours' => 0,
],
'totalExtendedHours' => 902,
];
$december = [
'site1' => [
'id' => 15,
'name' => 'Brazil',
'extendedHours' => 498,
],
'site2' => [
'id' => 43,
'name' => 'Portugal',
'extendedHours' => 409,
'extraRequests' => 6,
],
'totalExtendedHours' => 907,
'totalExtraRequests' => 6,
];
echo deepCompare(
$november, -- origin array
$december, -- target array
'Nov2022', -- descriptive name of origin array
'Dec2022', -- descriptive name of target array
true, -- should also compare arrays in reverse order?
true -- should care about array values? (false = names only)
);
这个例子将输出:
≠ Nov2022.site1.extendedHours value differs from Dec2022.site1.extendedHours
≠ Nov2022.site2.extendedHours value differs from Dec2022.site2.extendedHours
⍰ Nov2022.site3 has no equivalent Dec2022.site3
≠ Nov2022.totalExtendedHours value differs from Dec2022.totalExtendedHours
⍰ Dec2022.site2.extraRequests has no equivalent Nov2022.site2.extraRequests
⍰ Dec2022.totalExtraRequests has no equivalent Nov2022.totalExtraRequests
我希望这能帮助到一些人。
array_diff -计算数组的差值
http://php.net/manual/en/function.array-diff.php
数组$array1，数组$array2[，数组$…]) 将array1与一个或多个其他数组进行比较，并返回array1中没有出现在任何其他数组中的值。
