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| <?php
class GraphicsCard
{
public $brand;
public $model;
public function __construct($brand, $model)
{
$this->brand = $brand;
$this->model = $model;
}
}
$graphics_card = [
[
'brand'=>'华硕',
'model'=>'GTX980(Ti)',
'status'=>1,
],
[
'brand'=>'技嘉',
'model'=>'GTX970',
'status'=>0,
],
[
'brand'=>'微星',
'model'=>'GTX960',
'status'=>1,
],
[
'brand'=>'七彩虹',
'model'=>'GTX950',
'status'=>0,
],
];
$graphics_card2 = [];
foreach ($graphics_card as $value) {
$graphics_card2[] = new GraphicsCard($value['brand'], $value['model']);
}
$demoA1 = $graphics_card;
$demoA2 = $graphics_card2;
foreach ($demoA1 as $key => $value) {
$demoA1[$key]['model'] = '1080';
$demoA1[$key]['brand'] = '按摩店';
}
foreach ($demoA2 as $key => $item) {
$demoA2[$key]->brand = '按摩店';
$demoA2[$key]->model = '1080';
}
var_dump($demoA1);
var_dump($demoA2);
$demoB1 = $graphics_card;
$demoB2 = $graphics_card2;
$demoB1 = array_map(function ($value) {
$value['brand'] = '按摩店';
$value['model'] = '1080';
return $value;
}, $demoB1);
array_map(function ($value) {
$value->brand = '按摩店';
$value->model = '1080';
}, $demoB2);
var_dump($demoB1);
var_dump($demoB2);
$demoC1 = $graphics_card;
$demoC2 = $graphics_card2;
array_map(function ($key, $value) use (&$demoC1) {
$demoC1[$key]['brand'] = '按摩店';
$demoC1[$key]['model'] = '1080';
}, array_keys($demoC1), $demoC1);
array_map(function ($key, $value) use ($demoC2) {
$demoC2[$key]->brand = '按摩店';
$demoC2[$key]->model = '1080';
}, array_keys($demoC2), $demoC2);
var_dump($demoC1);
var_dump($demoC2);
$brands = [];
$models = [];
foreach ($graphics_card as $item) {
$brands[] = $item['brand'];
}
$models = array_map(function ($value) {
return $value['model'];
}, $graphics_card);
var_dump($brands);
var_dump($models);
var_dump(array_column($graphics_card, 'brand'));
var_dump(array_column($graphics_card, 'model'));
$items = [
'item1'=>'Hello',
'item2'=>'World',
'item3'=>'Luis',
'item4'=>'Edware',
'item5'=>'Ann',
'item6'=>'Eason',
];
foreach($items as $key => $value){
if($key === 'item1'){
$items[$key] = 'World';
}elseif($key === 'item3'){
$items[$key] = 'Edware';
}
}
var_dump($items);
$items_to_modify = ['item1'=>'Hello','item3'=>'Luis'];
array_map(function($key,$value) use(&$items) {
$items[$key] = $value;
},array_keys($items_to_modify),$items_to_modify);
var_dump($items);
|
