donk68254
donk68254
2018-02-28 17:20
浏览 48
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从php中的多维数组中删除重复值

I have csv file, i am reading data from it, i have join all which are randomly matching their rows like brands, customer and soon..,

Here i want to remove all duplicate from multi dimensional array which already in array

Here you can see how all duplicate values are appending to array in this image

Here is my php code

$csv = array_map('str_getcsv', file('test.csv'));
//echo '<pre>';
//print_r($csv);
//exit;
$brand =[];
foreach ($csv as $key => $value) {
    if(!(in_array($value[14], $brand))){
    $brand[$value[21]]['brands'][]=$value[14];    
    $brand[$value[21]]['products'][]=$value[1];    
    }   
}
echo '<pre>';
print_r($brand);

Thanks and welcome for all suggestions

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2条回答 默认 最新

  • dongzhang0243
    dongzhang0243 2018-02-28 17:35
    已采纳

    You need to modify where you are looking in the in_array. You want to do this for both I'm sure, as well as check that it is set first:

    foreach ($csv as $key => $value) {
        if(!isset($brand[$value[21]]['brands']) ||
           !in_array($value[14], $brand[$value[21]]['brands'])){
                $brand[$value[21]]['brands'][]=$value[14];
        }
        if(!isset($brand[$value[21]]['products']) ||
           !in_array($value[14], $brand[$value[21]]['products'])){
                $brand[$value[21]]['products'][]=$value[1];
        }            
    }
    
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  • dqt20140129
    dqt20140129 2018-02-28 17:25

    array_unique() could do that for you.

    http://php.net/manual/en/function.array-unique.php

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