如何在php中通过URL传递多个变量？

我试图在PHP中传递URL中的多个变量以获取一些信息，但我认为它不起作用

$allowedFunctions = array(
   'returnAllProducts',
   'refreshCurrentProduct'

);


$IDNUM = $_GET[ 'idNum' ];


$functionName = $_GET[ 'func' ];

if( in_array( $functionName, $allowedFunctions ) && function_exists( $functionName ) )
{
    $functionName();
}

然后我有了refreshCurrentProduct函数：

function refreshCurrentProduct() { 
$dbh=mysql_connect ("DATABASE","USER", "PASS") or die('I cannot connect to the database because:'. mysql_error());

mysql_select_db("TABLE");

$query = "SELECT `ID` FROM `PRODUCTS`";

$result = mysql_query($query) or die('Query failed:'.mysql_error());

$DB_STOCK = mysql_query("SELECT `STOCK` FROM `PRODUCTS`") or die('Query failed:'.mysql_error());

$DB_SHORT = mysql_query("SELECT `MYNAME` FROM `PRODUCTS`") or die('Query failed:'.mysql_error());

$DB_LONG = mysql_query("SELECT `DESCRIPTION` FROM `PRODUCTS`") or die('Query failed:'.mysql_error());

$DB_PRICE = mysql_query("SELECT `PRICE` FROM `PRODUCTS`") or die('Query failed:'.mysql_error());

$DB_SHIP = mysql_query("SELECT `SHIPPING` FROM `PRODUCTS`") or die('Query failed:'.mysql_error());


$ID = mysql_result($result,$IDNUM,"ID");
    $STOCK = mysql_result($DB_STOCK,$IDNUM,"STOCK");
    $SHORT = mysql_result($DB_SHORT,$IDNUM,"MYNAME");
    $LONG = mysql_result($DB_LONG,$IDNUM,"DESCRIPTION");
    $PRICE = mysql_result($DB_PRICE,$IDNUM,"PRICE");        
    $SHIP = mysql_result($DB_SHIP,$IDNUM,"SHIPPING");

    echo '
    //echo $STOCK, $SHORT, etc....

    ';
 }

function refreshCurrentProduct() { 
    $dbh=mysql_connect ("DATABASE","USER", "PASS") or die('I cannot connect to the database because:'. mysql_error());
    mysql_select_db("TABLE");

    // If $_GET['idNum'] is not a number use 0
    $rowNumber = is_numeric($_GET['idNum']) ? $_GET['idNum'] : 0;

    $query = "SELECT ID, STOCK,  MYNAME, DESCRIPTION, PRICE, SHIPPING FROM `PRODUCTS`";
    $result = mysql_query($query);

    if(mysql_data_seek($result,  $rowNumber)) {
        // The result set has indeed at least $rowNumber rows

        $row = mysql_fetch_assoc($result);

        echo $row['ID'];
        echo $row['STOCK'];
        // ... etc ....
    }
    else {
        echo "No such row!";
    }
}

我使用的URL是products.php？func=refreshCurrentProduct&idNum=4

理论上，这应该从包含4的行显示，但是，它只显示第一行的信息。如果我在函数中执行$IDNUM=5，它将显示第5行，因此我传递信息的方式有问题

另外，我如何创建例如$STOCK而不必在$DB_STOCK中有这么多代码？看来一定有更好的办法……

看看

此外，如果我正确阅读了您的代码，您可以在一个查询中获得所有信息：

$query = "SELECT `ID`,`STOCK`,`MYNAME`,`DESCRIPTION`,`PRICE`,`SHIPPING` FROM `PRODUCTS`";
$result = mysql_query($query) or die('Query failed:'.mysql_error());
while ($row = mysql_fetch_assoc($result)) {
    $ID=$row['ID'];
    //etc.
}

看一看

此外，如果我正确阅读了您的代码，您可以在一个查询中获得所有信息：

$query = "SELECT `ID`,`STOCK`,`MYNAME`,`DESCRIPTION`,`PRICE`,`SHIPPING` FROM `PRODUCTS`";
$result = mysql_query($query) or die('Query failed:'.mysql_error());
while ($row = mysql_fetch_assoc($result)) {
    $ID=$row['ID'];
    //etc.
}

---

为什么不按照其他人已经提到的那样做，$IDNUM不在函数的范围内：

function refreshCurrentProduct() { 
$dbh=mysql_connect ("DATABASE","USER", "PASS") or die('I cannot connect to the database because:'. mysql_error());

mysql_select_db("TABLE");

$query = "SELECT `ID` FROM `PRODUCTS`";

$result = mysql_query($query) or die('Query failed:'.mysql_error());

$DB_STOCK = mysql_query("SELECT `STOCK` FROM `PRODUCTS`") or die('Query failed:'.mysql_error());

$DB_SHORT = mysql_query("SELECT `MYNAME` FROM `PRODUCTS`") or die('Query failed:'.mysql_error());

$DB_LONG = mysql_query("SELECT `DESCRIPTION` FROM `PRODUCTS`") or die('Query failed:'.mysql_error());

$DB_PRICE = mysql_query("SELECT `PRICE` FROM `PRODUCTS`") or die('Query failed:'.mysql_error());

$DB_SHIP = mysql_query("SELECT `SHIPPING` FROM `PRODUCTS`") or die('Query failed:'.mysql_error());


$ID = mysql_result($result,$IDNUM,"ID");
    $STOCK = mysql_result($DB_STOCK,$IDNUM,"STOCK");
    $SHORT = mysql_result($DB_SHORT,$IDNUM,"MYNAME");
    $LONG = mysql_result($DB_LONG,$IDNUM,"DESCRIPTION");
    $PRICE = mysql_result($DB_PRICE,$IDNUM,"PRICE");        
    $SHIP = mysql_result($DB_SHIP,$IDNUM,"SHIPPING");

    echo '
    //echo $STOCK, $SHORT, etc....

    ';
 }

function refreshCurrentProduct() { 
    $dbh=mysql_connect ("DATABASE","USER", "PASS") or die('I cannot connect to the database because:'. mysql_error());
    mysql_select_db("TABLE");

    // If $_GET['idNum'] is not a number use 0
    $rowNumber = is_numeric($_GET['idNum']) ? $_GET['idNum'] : 0;

    $query = "SELECT ID, STOCK,  MYNAME, DESCRIPTION, PRICE, SHIPPING FROM `PRODUCTS`";
    $result = mysql_query($query);

    if(mysql_data_seek($result,  $rowNumber)) {
        // The result set has indeed at least $rowNumber rows

        $row = mysql_fetch_assoc($result);

        echo $row['ID'];
        echo $row['STOCK'];
        // ... etc ....
    }
    else {
        echo "No such row!";
    }
}

不需要点击数据库六次！当然，您需要添加错误处理

顺便问一下，参数idNum是否与数据库中记录的ID相同？如果是这样，您甚至可以进一步简化：

function refreshCurrentProduct() { 
    $dbh=mysql_connect ("DATABASE","USER", "PASS") or die('I cannot connect to the database because:'. mysql_error());
    mysql_select_db("TABLE");

    // If $_GET['idNum'] is not a number use 0
    $id = is_numeric($_GET['idNum']) ? $_GET['idNum'] : 0;

    $query = "SELECT ID, STOCK,  MYNAME, DESCRIPTION, PRICE, SHIPPING FROM `PRODUCTS` WHERE ID = $id";
    $result = mysql_query($query);

    if (mysql_num_rows($result) == 0) {
       echo "No rows found, nothing to print";
       return;
    }

    $row = mysql_fetch_assoc($result);

    echo $row['ID'];
    echo $row['STOCK'];
    // ... etc ....
}

---

为什么不按照其他人已经提到的那样做，$IDNUM不在函数的范围内：

function refreshCurrentProduct() { 
$dbh=mysql_connect ("DATABASE","USER", "PASS") or die('I cannot connect to the database because:'. mysql_error());

mysql_select_db("TABLE");

$query = "SELECT `ID` FROM `PRODUCTS`";

$result = mysql_query($query) or die('Query failed:'.mysql_error());

$DB_STOCK = mysql_query("SELECT `STOCK` FROM `PRODUCTS`") or die('Query failed:'.mysql_error());

$DB_SHORT = mysql_query("SELECT `MYNAME` FROM `PRODUCTS`") or die('Query failed:'.mysql_error());

$DB_LONG = mysql_query("SELECT `DESCRIPTION` FROM `PRODUCTS`") or die('Query failed:'.mysql_error());

$DB_PRICE = mysql_query("SELECT `PRICE` FROM `PRODUCTS`") or die('Query failed:'.mysql_error());

$DB_SHIP = mysql_query("SELECT `SHIPPING` FROM `PRODUCTS`") or die('Query failed:'.mysql_error());


$ID = mysql_result($result,$IDNUM,"ID");
    $STOCK = mysql_result($DB_STOCK,$IDNUM,"STOCK");
    $SHORT = mysql_result($DB_SHORT,$IDNUM,"MYNAME");
    $LONG = mysql_result($DB_LONG,$IDNUM,"DESCRIPTION");
    $PRICE = mysql_result($DB_PRICE,$IDNUM,"PRICE");        
    $SHIP = mysql_result($DB_SHIP,$IDNUM,"SHIPPING");

    echo '
    //echo $STOCK, $SHORT, etc....

    ';
 }

function refreshCurrentProduct() { 
    $dbh=mysql_connect ("DATABASE","USER", "PASS") or die('I cannot connect to the database because:'. mysql_error());
    mysql_select_db("TABLE");

    // If $_GET['idNum'] is not a number use 0
    $rowNumber = is_numeric($_GET['idNum']) ? $_GET['idNum'] : 0;

    $query = "SELECT ID, STOCK,  MYNAME, DESCRIPTION, PRICE, SHIPPING FROM `PRODUCTS`";
    $result = mysql_query($query);

    if(mysql_data_seek($result,  $rowNumber)) {
        // The result set has indeed at least $rowNumber rows

        $row = mysql_fetch_assoc($result);

        echo $row['ID'];
        echo $row['STOCK'];
        // ... etc ....
    }
    else {
        echo "No such row!";
    }
}

不需要点击数据库六次！当然，您需要添加错误处理

顺便问一下，参数idNum是否与数据库中记录的ID相同？如果是这样，您甚至可以进一步简化：

function refreshCurrentProduct() { 
    $dbh=mysql_connect ("DATABASE","USER", "PASS") or die('I cannot connect to the database because:'. mysql_error());
    mysql_select_db("TABLE");

    // If $_GET['idNum'] is not a number use 0
    $id = is_numeric($_GET['idNum']) ? $_GET['idNum'] : 0;

    $query = "SELECT ID, STOCK,  MYNAME, DESCRIPTION, PRICE, SHIPPING FROM `PRODUCTS` WHERE ID = $id";
    $result = mysql_query($query);

    if (mysql_num_rows($result) == 0) {
       echo "No rows found, nothing to print";
       return;
    }

    $row = mysql_fetch_assoc($result);

    echo $row['ID'];
    echo $row['STOCK'];
    // ... etc ....
}

$IDNUM变量不在函数的作用域内。您需要将其作为变量传递到函数中，或者您应该能够通过在函数中设置它来在函数中设置它

function refreshCurrentProduct() { 
  $IDNUM = $_GET[ 'idNum' ];
  ...
}

$IDNUM变量不在函数的作用域内。您需要将其作为变量传递到函数中，或者您应该能够通过在函数中设置它来在函数中设置它

function refreshCurrentProduct() { 
  $IDNUM = $_GET[ 'idNum' ];
  ...
}

---

不完全是这样，OP想要得到某一行，而不是所有的行。顺便说一句$functionName不是OPs的问题。这和预期的一样。不完全一样，OP想要得到某一行，而不是所有的行。顺便说一句$functionName不是OPs的问题。这与预期的一样。mysql\u错误为公共错误消息披露了太多信息。而且，旧的mysql驱动程序已经过时了。查看PDO和prepared statements.mysql_error为公共错误消息披露了太多信息。而且，旧的mysql驱动程序已经过时了。调查PDO和准备好的报表。