我有一个多维数组，我想从每个数组项中获取键'data'并形成另一个数组，如第一个数组'data'元素有3个项目，第二个有1个项目，第3个和第4个是空的，第5个有一个item，我想制作一个像$temp_array['first_item_from_first_array,..., first_item_from_fifth_array, 'second_item_from_second_array,....,second_item_From_fifth_array]这样的独立数组
输入数组是，
Array
(
[0] => Array
(
[meal_type] => bf
[label] => Breakfast
[calorie_limit] => 30
[total_calorie] => 0
[data] => Array
(
[0] => Array
(
[id] => 109
[label] => testfrom
[quantity] => 12
[unit] => g
)
[1] => Array
(
[id] => 118
[label] => test
[quantity] => 200
[unit] => oz
)
[2] => Array
(
[id] => 121
[label] => test
[quantity] => 10
[unit] => g
)
)
)
[1] => Array
(
[meal_type] => sn
[label] => Snacks
[calorie_limit] => 10
[total_calorie] => 0
[data] => Array
(
[0] => Array
(
[id] => 120
[label] => testfrom
[quantity] => 12
[unit] => g
)
)
)
[2] => Array
(
[meal_type] => lu
[label] => Lunch
[calorie_limit] => 20
[total_calorie] => 0
[data] => Array
(
)
)
[3] => Array
(
[meal_type] => su
[label] => Supper
[calorie_limit] => 30
[total_calorie] => 0
[data] => Array
(
)
)
[4] => Array
(
[meal_type] => dn
[label] => Dinner
[calorie_limit] => 20
[total_calorie] => 0
[data] => Array
(
[0] => Array
(
[id] => 119
[label] => test
[quantity] => 200
[unit] => oz
)
)
)
)
输出就像这样
Array
(
[0] => Array
(
[0] => Array
(
[id] => 109
[label] => testfrom
[quantity] => 12
[unit] => g
)
[1] => Array
(
[id] => 120
[label] => testfrom
[quantity] => 12
[unit] => g
)
[2] => Array
(
)
[3] => Array
(
)
[4] => Array
(
[id] => 119
[label] => test
[quantity] => 200
[unit] => oz
)
)
[1] => Array
(
[0] => Array
(
[id] => 118
[label] => test
[quantity] => 200
[unit] => oz
)
[1] => Array
(
)
[2] => Array
(
)
[3] => Array
(
)
[4] => Array
(
)
)
[2] => Array
(
[0] => Array
(
[id] => 121
[label] => test
[quantity] => 10
[unit] => g
)
[1] => Array
(
)
[2] => Array
(
)
[3] => Array
(
)
[4] => Array
(
)
)
)
你需要这样做： -
$data_array= array_column($array,'data');
$count = 0;
foreach($data_array as $data){
$real_count = count($data);
if($real_count > $count){
$count = $real_count;
}
}
echo $count;
$final_array = [];
foreach($data_array as $data_arr){
for($i=0;$i< $count; $i++){
$final_array[$i][] = (count($data_arr[$i])>0)? $data_arr[$i]: array();
}
}
echo "<pre/>";print_r($final_array);
示例： -
<?php
$array = [
[
"meal_type" => "bf",
"data" => [
"name" => "test",
"email" => "[email protected]"
]
],
[
"meal_type" => "bf",
"data" => []
]
];
echo "<pre>";
print_r(array_column($array, "data"));
?>
您可以使用foreach和array_push执行此操作。
$data_item_array = [];
foreach ($array as $item) {
$data = $item['data'];
foreach ($data as $t) {
array_push($data_item_array, $t);
}
}
print_r($data_item_array);
输出将是：
阵列（
[0] => Array
(
[id] => 109
[label] => testfrom
[quantity] => 12
[unit] => g
)
[1] => Array
(
[id] => 118
[label] => test
[quantity] => 200
[unit] => oz
)
[2] => Array
(
[id] => 121
[label] => test
[quantity] => 10
[unit] => g
)
[3] => Array
(
[id] => 120
[label] => testfrom
[quantity] => 12
[unit] => g
)
[4] => Array
(
[id] => 119
[label] => test
[quantity] => 200
[unit] => oz
)
)