我需要顯示下面的 [dr-spec] 數(shù)組中的值并過濾重復(fù)項(xiàng)：Array( [0] => Array ( [dr-spec] => Array ( [0] => Oncology ) ) [1] => Array ( [dr-spec] => Array ( [0] => Plastic Surgery [1] => Dental ) ) [2] => Array ( [dr-spec] => Array ( [0] => Oncology [1] => Plastic Surgery ) ))經(jīng)過兩天的嘗試和錯誤，我做了這個(gè)：<?php foreach( $attributes['doctor'] as $doctor ): // Loop through the top array foreach( $doctor['dr-spec'] as $spec ): // Loop through the dr-spec array $result[] = $spec; // assign string into a new array endforeach; endforeach; $result = array_unique($result); // filter duplicates inside the array foreach( $result as $result ): echo $result // html ommitted <?php endforeach; ?>也許有更好的（緊湊的）方法來做到這一點(diǎn)？
1 回答
猛跑小豬
TA貢獻(xiàn)1858條經(jīng)驗(yàn) 獲得超8個(gè)贊
dr-spec您可以獲取所有子數(shù)組中的所有項(xiàng)目，將它們合并到一個(gè)數(shù)組中，然后獲取唯一值：
$result = array_unique(array_merge(...array_column($attributes['doctor'], 'dr-spec')));
僅出于學(xué)習(xí)目的，使用當(dāng)前代碼，您可以檢查它是否在數(shù)組中以消除array_unique：
foreach( $attributes['doctor'] as $doctor ): // Loop through the top array
foreach( $doctor['dr-spec'] as $spec ): // Loop through the dr-spec array
if(!in_array($spec, $result)) {
$result[] = $spec; // assign string into a new array
}
endforeach;
endforeach;
或者合并它們以消除第二個(gè)循環(huán)：
$result = [];
foreach( $attributes['doctor'] as $doctor ): // Loop through the top array
$result = array_merge($result, $doctor['dr-spec']);
endforeach;
$result = array_unique($result);
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