如何在PHP中將array_unique的字符串轉換為數組

Question

如何從數組中的MYSQL轉換我的值字符串？ 所以我可以使用array_unique。 因為我在一列中有多個重復項。 當我回聲。 它以PHP顯示所有內容。 我試過DISTINCT，但它只返回一列，而不返回其他列。

不斷重復名稱（BOLD RED）。

碼：

$querysql= "SELECT * FROM `stock` WHERE ID = '$id' ";

$fetchdata = $database->query($querysql);

while($rows= $fetchdata->fetch_assoc()) {

echo "<div id='companylocal'>";
    echo $rows['Company_Locate'];
echo "</div>";
}

Answer 1

嘗試在查詢中使用GROUP BY

$querysql= "SELECT * FROM `stock` WHERE ID = '$id' GROUP BY Company_Locate";

Answer 2

嘗試這個，

$querysql= "SELECT * FROM `stock` WHERE ID = '$id' ";

$fetchdata = $database->query($querysql);

while($row= $fetchdata->fetch_assoc()) {
    $rows[] = $row['Company_Locate'];
}
$rows = array_unique($rows);
print_r($rows);

Answer 3

表名稱： 測試

---

| id | colA | colB |

---

| 5 | 值5 | 值C |

---

| 4 | 值4 | 值B |

---

| 3 | 值3 | 值B |

---

| 2 | 值2 | 值B |

---

| 1 | 值1 | 值A |

---

從上面的示例中。 column（colA）具有唯一值，而column（colB）具有重復值。 按column（colB）分組查詢將返回具有column（colB）中唯一值的行

SQL： SELECT id，colA，colB FROM test GROUP BY colB返回：

---

| id | colA | colB |

---

| 1 | 值1 | 值A |

---

| 2 | 值2 | 值B |

---

| 5 | 值5 | 值C |

---

有關更多更好的解釋，請檢查https://www.w3schools.com/sql/sql_groupby.asp

$DataFromDatabase = [ ['id' => 1,
                   'colA' => "value 1",
                   'colB' => "value A"
                  ],
                  ['id' => 2,
                   'colA' => "value 2",
                   'colB' => "value B"
                  ],
                  ['id' => 3,
                   'colA' => "value 3",
                   'colB' => "value B"
                  ],
                  ['id' => 4,
                   'colA' => "value 4",
                   'colB' => "value B"
                  ],
                  ['id' => 5,
                   'colA' => "value 5",
                   'colB' => "value C"
                  ]
                ];
    echo "Data FROM database<br/>";

echo "<pre>"; print_r($DataFromDatabase); echo "</pre>";

//Unique Array $UniqueArray = [];

//Loop the Database result
foreach($DataFromDatabase AS $data){
    //Make the unique value your key for your array
    $UniqueArray[$data['colB']][] = ['id' => $data['id'],
                                     'colA' => $data['colA']
                                    ];
}

echo "Unique Array<br/>";
echo "<pre>";
print_r($UniqueArray);
echo "</pre>";

您的uniqueArray的結果將如下所示：

Array
(
    [value A] => Array
        (
            [0] => Array
                (
                    [id] => 1
                    [colA] => value 1
                )

        )

    [value B] => Array
        (
            [0] => Array
                (
                    [id] => 2
                    [colA] => value 2
                )

            [1] => Array
                (
                    [id] => 3
                    [colA] => value 3
                )

            [2] => Array
                (
                    [id] => 4
                    [colA] => value 4
                )

        )

    [value C] => Array
        (
            [0] => Array
                (
                    [id] => 5
                    [colA] => value 5
                )

        )

)

值堆疊在每個唯一的column（colB）值上。 現在由您決定如何打印數組的值