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                            # flatMap方法

遍歷集合并將其中的每個值傳遞到給定的回調。

可以通過回調修改每個值的內容再返回出來，從而形成一個新的被修改過內容的集合。

然后就可以用 [all()](/collections/all.md) 打印修改后的數組。

```
$collection = collect([
    ['name' => 'Sally'],
    ['school' => 'Arkansas'],
    ['age' => 28]
]);

$flattened = $collection->flatMap(function ($values) {
    return array_map('strtoupper', $values);
});

$flattened->all(); // ['name' => 'SALLY', 'school' => 'ARKANSAS', 'age' => '28'];
```
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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