从foreach值创建关联数组

Question

我想从foreach循环创建关联数组。

if (sizeof($ads) > 0) { 
    foreach($ads as $social_item) { 
     $sdbr .= $social_item['sidebar']; 
     $pno .= $social_item['no']; 
     } 
     echo $sdbr // cow hen 
     echo $pno // milk egg 
    } 

如何创建像这样的关联数组？

$out = array("cow"=>"milk","hen"=>"egg"); 

Answer 1

使用sidebar为关键和no作为值：

foreach($ads as $social_item) { 
    $sdbr = $social_item['sidebar']; 
    $pno = $social_item['no']; 
    $out[$sdbr] = $pno; 
    } 
} 
print_r($out); 

如果您仍然需要字符串：

foreach($ads as $social_item) { 
    $sdbr .= $social_item['sidebar']; 
    $pno .= $social_item['no']; 
    $out[$social_item['sidebar']] = $social_item['no']; 
    } 
    echo $sdbr // cow hen 
    echo $pno // milk egg 
}