Question

我有2个数组：

阵列A

Array
(
       [0] => Array
            (
                [TD_CODE] => 24203
                [CRS_NAME] => Adobe Photoshop CS6+CC            
            )

        [1] => Array
            (
                [TD_CODE] => 24202
                [CRS_NAME] => Advance Microsoft excel 2010/2007
            )

        [2] => Array
            (
                [TD_CODE] => 24197
                [CRS_NAME] => Beginning Auditor Tools and Techniques

            )
    );

和阵列B

Array
(
    [0] => Array
        (
            [crs_id] => 1
            [crs_ia_id] => 2017-6495
            [crs_oracle_id] => 24653
            [crs_name] => Windows8          
            [crs_start_date] => 2017-08-07
            [crs_end_date] => 2017-08-11

        )

    [1] => Array
        (
            [crs_id] => 2
            [crs_ia_id] => 2017-5013
            [crs_oracle_id] => 24202
            [crs_name] => Advance Microsoft excel 2010/2007
            [crs_start_date] => 2017-02-08
            [crs_end_date] => 2017-02-09

        )

）

我想让数组A成为一个不同的数组B. 条件是使用数组A 的TD_CODE比较到数组b的crs_oracle_id并将其作为数组C。

所以结果如下。

Array
(
       [0] => Array
            (
                [TD_CODE] => 24203
                [CRS_NAME] => Adobe Photoshop CS6+CC            
            )

      [1] => Array
            (
                [TD_CODE] => 24197
                [CRS_NAME] => Beginning Auditor Tools and Techniques

            )
    );

我该怎么办？

Answer 1

您可以使用array_filter()匿名函数来比较NULL和TD_CODE

crs_oracle_id

Answer 2

从第二个数组获取需要被拒绝的ID，然后只添加这个id数组中不存在的记录，

$rejected_ids = array_column($b,'crs_oracle_id');
$c = [];
foreach($a as $v){
    if(!in_array($v['TD_CODE'], $rejected_ids)){
        $c[] = $v;
    }
}

print_r($c);

array_column - 返回输入数组中单个列的值

这是有效的demo

编辑

这是更优化的代码，

$c = array_filter($a, function($v,$k) use($rejected_ids){
    return !in_array($v['TD_CODE'], $rejected_ids);
},ARRAY_FILTER_USE_BOTH);

以下是demo。

array_filter - 使用回调函数过滤数组元素

ARRAY_FILTER_USE_BOTH - 将值和键作为参数传递给回调而不是值

Answer 3

如果您的PHP版本低于5.5那么请使用此功能

if (! function_exists('array_column')) {
    function array_column(array $input, $columnKey, $indexKey = null) {
        $array = array();
        foreach ($input as $value) {
            if ( !array_key_exists($columnKey, $value)) {
                trigger_error("Key \"$columnKey\" does not exist in array");
                return false;
            }
            if (is_null($indexKey)) {
                $array[] = $value[$columnKey];
            }
            else {
                if ( !array_key_exists($indexKey, $value)) {
                    trigger_error("Key \"$indexKey\" does not exist in array");
                    return false;
                }
                if ( ! is_scalar($value[$indexKey])) {
                    trigger_error("Key \"$indexKey\" does not contain scalar value");
                    return false;
                }
                $array[$value[$indexKey]] = $value[$columnKey];
            }
        }
        return $array;
    }
}

ARRAY - A

$array_a = Array
(
       '0' => Array
            (
                'TD_CODE' => '24203',
                'CRS_NAME' => 'Adobe Photoshop CS6+CC'          
            ),

        '1' => Array
            (
                'TD_CODE' => '24202',
                'CRS_NAME' => 'Advance Microsoft excel 2010/2007'
            ),

        '2' => Array
            (
                'TD_CODE' => '24197',
                'CRS_NAME' => 'Beginning Auditor Tools and Techniques'

            )
    );

ARRAY - B

$array_b = Array
(
    '0' => Array
        (
            'crs_id' => '1',
            'crs_ia_id' => '2017-6495',
            'crs_oracle_id' => '24653',
            'crs_name' => 'Windows8',        
            'crs_start_date' => '2017-08-07',
            'crs_end_date' => '2017-08-11'

        ),

    '1' => Array
        (
            'crs_id' => '2',
            'crs_ia_id' => '2017-5013',
            'crs_oracle_id' => '24202',
            'crs_name' => 'Advance Microsoft excel 2010/2007',
            'crs_start_date' => '2017-02-08',
            'crs_end_date' => '2017-02-09'

        )
        );

ARRAY - C

$array_c = array();


        foreach ($array_a as $a){

        if(!in_array($a['TD_CODE'], array_column($array_b, 'crs_oracle_id'))) {
            $array_c[] = array('TD_CODE' => $a['TD_CODE'],'CRS_NAME'=>$a['CRS_NAME']);
        }
        }
        print_r($array_c);

PHP不同的2个数组和使用条件进行比较

3 个答案: