从一个数组中获取键及其值的最佳方法，而另一个数组不存在这些键及其值，仅通过其键进行比较 - Best way to get keys and its values from an array which are not existent in another array compared only by its keys

Best way to get keys and its values from an array which are not existent in another array compared only by its keys

hi我想在与另一个数组比较时过滤掉一些键和值。"内容"对应显示在末尾。。。非常感谢您的帮助！

<?php
$test = array(
            ['slideid'] => 597,
            ['token'] =>'4e23fdd176372984870a9c65db7133b5',
            ['content'] =>'<p>sdg</p>',
        )
$test2 = array(
            ['slideid'] => "",
            ['token'] =>""
            )
foreach ($test not in $test2){
    print $test2
} //not working of course   
?>

这是有效的：

$test = array(
    'slideid' => 597,
    'token' =>'4e23fdd176372984870a9c65db7133b5',
    'content' =>'<p>sdg</p>'
);
$test2 = array(
    'slideid' => "",
    'token' =>""
);
foreach ($test as $key => $value){
    if (!array_key_exists($key, $test2)) {
        echo $value;
    }
}

$arr包含在test但不在test2 中的元素

$arr = array_diff(array_keys($test), array_keys($test2));
print_r($arr);