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PHP合并某个字段相同的数组,并重组数据算法

booksmg2014 2022-02-17 阅读 197

对数组$array重组:

    $array = array(  
                array('id'=>1,'name'=>'aa','pwd'=>'12'),  
                array('id'=>1,'name'=>'bb','pwd'=>'56'),  
                array('id'=>1,'name'=>'saa','pwd'=>'89'),  
                  
                array('id'=>2,'name'=>'cc','pwd'=>'78')  
          );  

实现代码如下:

   $tmpArray = array();  
    foreach ($array as $row) {  
          
        $key = $row['id'];  
        if (array_key_exists($key, $tmpArray)) {  
            //$tmpArray[$key]['pwd'] = $tmpArray[$key]['pwd']  . ',' . $row['pwd'];  //用这句的话下面有关pwd的条件语句都要删掉,实现其字符串形式  
            if (is_array($tmpArray[$key]['name'])) {  
                $tmpArray[$key]['name'][] = $row['name'];  
            } else {  
                $tmpArray[$key]['name'] = array($tmpArray[$key]['name'], $row['name']);  
            }  
            if (is_array($tmpArray[$key]['pwd'])) {  
                $tmpArray[$key]['pwd'][] = $row['pwd'];  
            } else {  
                $tmpArray[$key]['pwd'] = array($tmpArray[$key]['pwd'], $row['pwd']);  
            }  
        } else {  
            $tmpArray[$key] = array('id'=>$row['id'],'name'=>array($row['name']),'pwd'=>array($row['pwd'])); //此句要注意,可设置  
            // $tmpArray[$key] = $row; // 有字段相加时可能会代替上面一句  
        }  
    }  

    echo "<pre>";  
    var_dump($tmpArray);  

打印结果为:

array (size=2)
1 =>
array (size=3)
‘id’ => int 1
‘name’ =>
array (size=3)
0 => string ‘aa’ (length=2)
1 => string ‘bb’ (length=2)
2 => string ‘saa’ (length=3)
‘pwd’ =>
array (size=3)
0 => string ‘12’ (length=2)
1 => string ‘56’ (length=2)
2 => string ‘89’ (length=2)
2 =>
array (size=3)
‘id’ => int 2
‘name’ =>
array (size=1)
0 => string ‘cc’ (length=2)
‘pwd’ =>
array (size=1)
0 => string ‘78’ (length=2)
// f i e l d 为 一 维 数 字 数 组 , field 为一维数字数组, fieldfield[0]为用于分组的单一字段。

   public function combine($array,$field){  
    $tmpArray = array();  
    $distinct_field = $field[0];  
    unset($field[0]);  
    foreach ($array as $row) {  
        $key = $row[$distinct_field];  
        if (array_key_exists($key, $tmpArray)) {  
            foreach($field as $value){  
                if (is_array($tmpArray[$key][$value])) {  
                    $tmpArray[$key][$value][] = $row[$value];  
                } else {  
                    $tmpArray[$key][$value] = array($tmpArray[$key][$value], $row[$value]);  
                }  
            }  
        } else {  
            $tmpArray[$key][$distinct_field] = $row[$distinct_field];  
            foreach ($field as $value){  
                $tmpArray[$key][$value] = array($row[$value]);  
            }  
        }  
    }  
    return $tmpArray;  
   }  
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