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Php multi-dimensional array to remove duplicate values: 1, the use of "array_map ('serialize', $arr)" to convert the multi-dimensional array into a string in the form of an one-dimensional array; 2, use array_unique () to remove repeated values in the one-dimensional array; 3, the deduplicated one-dimensional array back to a multi-dimensional array.

Operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

Php multi-dimensional array to remove duplicate values

1. Realize the function of removing repeated values from multi-dimensional array.

Function array_unique_new ($arr) {$t = array_map ('serialize', $arr); / / use the serialize () method to convert the array into an one-dimensional array in the form of a string $t = array_unique ($t); / / remove the duplicate value $new_arr = array_map (' unserialize', $t); / / then convert the newly constructed one-dimensional array back to the php value return $new_arr }

2. An array that needs to remove duplicate values

Arr = array (array ('sup_name' = >' Shanghai', 'cn_name' = >' EthylAcetate', 'en_name' = >' ethyl acetate 1', 'pinyin' = >' yisuanyizhi', 'pro_info' = >' consumables',), array ('sup_name' = >' Shanghai 2', 'cn_name' = >' EthylAcetate', 'en_name' = >' ethyl acetate 2', 'pinyin' = >' yisuanyizhi' 'pro_info' = >' consumables',), array ('sup_name' = >' Shanghai 418', 'cn_name' = >' EthylAcetate', 'en_name' = >' ethyl acetate 1', 'pinyin' = >' yisuanyizhi', 'pro_info' = >' consumables',), array ('sup_name' = >' Shanghai', 'cn_name' = >' EthylAcetate', 'en_name' = >' ethyl acetate 3' 'pinyin' = >' yisuanyizhi', 'pro_info' = >' consumables',), array ('sup_name' = >' Shanghai', 'cn_name' = >' EthylAcetate', 'en_name' = >' ethyl acetate', 'pinyin' = >' yisuanyizhi', 'pro_info' = >' consumables',), array ('sup_name' = >' Shanghai', 'cn_name' = >' EthylAcetate'') 'en_name' = >' ethyl acetate 3', 'pinyin' = >' yisuanyizhi', 'pro_info' = >' consumables',), array ('sup_name' = >' Shanghai 1', 'cn_name' = >' EthylAcetate', 'en_name' = >' ethyl acetate 4', 'pinyin' = >' yisuanyizhi', 'pro_info' = >' consumables',))

Look at the output:

3. Execute the test

$new_arr = array_unique_new ($arr); echo''; print_r ($new_arr)

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