如何访问 PHP 中的二维数组字段

Question

-----问题已解决，请参阅下面的更新2---- 我将所有 MySQL 个查询结果放入一个二维数组中：

$suppDescription=mysql_query($query);
$rows = mysql_num_rows($results);
$allSupplierInfo=array();

for($i=0; $i<$rows; $i++){
    $allSupplierInfo[]=mysql_fetch_row($suppDescription);
}

但现在我无法访问 $allSuppliersInfo 字段。

 echo $allSupplierInfo[1][1]; // prints out 'Array'
 echo $allSupplierInfo[1]['id'];  //prints out nothing

我做错了什么？

--------更新-----

print_r($allSupplierInfo) 打印以下内容，所以看起来循环没有像我希望的那样工作：

Array (
    [0] => Array ( [0] => Array ( [0] =>ID_A[1] => name_A [2] => Address_A[3] => Link_A ) ) 
    [1] => Array ( [0] => Array ( [0] =>ID_A[1] => name_A [2] => Address_A[3] => Link_A ) [1] => Array ( [0] =>ID_B[1] => Name_B [2] => Address_B [3] => Link_B ) ) 
    [2] => Array ( [0] => Array ( [0] =>ID_A[1] => name_A [2] => Address_A[3] => Link_A ) [1] => Array ( [0] =>ID_B[1] => Name_B [2] => Address_B [3] => Link_B ) [2] => Array ( [0] =>ID_C[1] => Name_C [2] => Address_C [3] => Link_C ) ) 
    [3] => Array ( [0] => Array ( [0] =>ID_A[1] => name_A [2] => Address_A[3] => Link_A ) [1] => Array ( [0] =>ID_B[1] => Name_B [2] => Address_B [3] => Link_B ) [2] => Array ( [0] =>ID_C[1] => Name_C [2] => Address_C [3] => Link_C ) [3] => Array ( [0] =>ID_D[1] => Name_D [2] => Address_D [3] => Link_D ) ) 
    [4] => Array ( [0] => Array ( [0] =>ID_A[1] => name_A [2] => Address_A[3] => Link_A ) [1] => Array ( [0] =>ID_B[1] => Name_B [2] => Address_B [3] => Link_B ) [2] => Array ( [0] =>ID_C[1] => Name_C [2] => Address_C [3] => Link_C ) [3] => Array ( [0] =>ID_D[1] => Name_D [2] =>     Address_D [3] => Link_D ) [4] => Array ( [0] =>ID_E[1] => Name_E [2] => Address_E [3] => Address_E ) ) )

------ 更新 2----- 按照 RiggsFolly 的建议，使用 while 循环解决了问题，我可以按照最初的需要访问字段。我仍然不明白为什么我使用的 for 循环没有像我想的那样循环 - 任何解释将不胜感激。

Answer 1

我认为您对 mysql 结果处理感到困惑，您在检查返回的行数时使用 $result 但它应该是 $suppDescription.

这意味着您的 for 循环不会运行因为您将得到 0 或可能 FALSE 作为对 mysql_num_rows($suppDescription);

的响应

$suppDescription=mysql_query($query);
$rows = mysql_num_rows($suppDescription);
$allSupplierInfo=array();

for($i=0; $i<$rows; $i++){
    $allSupplierInfo[]=mysql_fetch_row($suppDescription);
}

此外，使用 while loop 可以更轻松地完成此操作，然后您只需处理返回的内容即可，无需费心获取行数。

$suppDescription=mysql_query($query);

$allSupplierInfo=array();

while ( $rows = mysql_fetch_row($suppDescription) ) {
    $allSupplierInfo[]=mysql_fetch_row($suppDescription);
}

如何访问 PHP 中的二维数组字段

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