Question

该功能非常简单：

变量：$ table是更新正在进行的表和$ fields是表中的字段，和$值从一个帖子生成并放入$ values数组中和$ where是表的索引字段的id的值 $ indxfldnm是索引字段名称

function SQLUpdate($table,$fields,$values,$where,$indxfldnm) {

  //Connect to DB
    $dbaddr = DB_HOST;
    $dbusr = DB_USER;
    $dbpwd = DB_PASSWORD;
    $dbname = DB_DATABASE;

  $db = new PDO('mysql:host='.$dbaddr .';dbname='.$dbname.';charset=UTF8', $dbusr, $dbpwd); 

  //build the fields
  $buildFields = '';
  if (is_array($fields)) {

    //loop through all the fields
    foreach($fields as $key => $field) :
      if ($key == 0) {
        //first item
        $buildFields .= $field;
      } else {
        //every other item follows with a ","
        $buildFields .= ', '.$field;
      }
    endforeach;

  } else {
    //we are only inserting one field
    $buildFields .= $fields;
  }

  //build the values
  $buildValues = '';
  if (is_array($values)) {

    //loop through all the values
    foreach($values as $key => $value) :
      if ($key == 0) {
        //first item
        $buildValues .= '?';
      } else {
        //every other item follows with a ","
        $buildValues .= ', ?';
      }
    endforeach;

  } else {
    //we are only updating one field
    $buildValues .= ':value';
  }
 $sqlqry = 'UPDATE '.$table.' SET ('.$buildFields.' = '.$buildValues.') WHERE `'.$indxfldnm.'` = \''.$where.'\');';

   $prepareUpdate = $db->prepare($sqlqry); 
  //execute the update for one or many values
  if (is_array($values)) {
    $prepareUpdate->execute($values);
  } else {
    $prepareUpdate->execute(array(':value' => $values));
  }

  //record and print any DB error that may be given
  $error = $prepareUpdate->errorInfo();
  if ($error[1]) print_r($error);



 echo $sqlqry;
 return $sqlqry;
}

到目前为止一切顺利然而它不起作用将值传递到适当的更新语句中的字段有问题但我对pdo并没有那么好并且设置它帮助修复代码将参数绑定到更新中的值会有所帮助非常感谢

谢谢

Answer 1

尝试在您的功能中获取此功能

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDBPDO";

try {
    $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
    // set the PDO error mode to exception
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

    $sql = "UPDATE MyGuests SET lastname='Doe' WHERE id=2";

    // Prepare statement
    $stmt = $conn->prepare($sql);

    // execute the query
    $stmt->execute();

    // echo a message to say the UPDATE succeeded
    echo $stmt->rowCount() . " records UPDATED successfully";
    }
catch(PDOException $e)
    {
    echo $sql . "<br>" . $e->getMessage();
    }

$conn = null;
?>

Answer 2

将代码更改为其他版本：

这消除了多值问题

function SQLUpdate($table,$fields,$values,$where,$indxfldnm) {


  $dbdata = array();
  $i=0;

    foreach ($fields as $fld_nm) 
    {
        if ($i > 0) {
        $dbdata[$fld_nm] = $values[$i]; }   
        $i++;

    } //end foreach
$buildData = '';
foreach ($dbdata as $key => $val) {
    if (empty($val)) {$buildData .= '`'.$key.'` = \'NULL\', ';} else {
    $buildData .= '`'.$key.'` = \''.$val.'\', ';}

}
$buildData = substr($buildData,0,-2);


    $dbaddr = DB_HOST;
    $dbusr = DB_USER;
    $dbpwd = DB_PASSWORD;
    $dbname = DB_DATABASE;
$prepareUpdate ='';
try {
  $db = new PDO('mysql:host='.$dbaddr .';dbname='.$dbname.';charset=UTF8', $dbusr, $dbpwd); 
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$db->exec("SET CHARACTER SET utf8"); 

 $sqlqry = 'UPDATE '.$table.' SET '.$buildData.' WHERE `'.$indxfldnm.'` = \''.$where.'\';';

   $prepareUpdate = $db->exec($sqlqry); 
  //execute the update for one or many values
}
 catch(PDOException $e)
    {
    $e->getMessage();
    print_r($e);
    }


 return $sqlqry;


} 
//END: SQLUpdate

PDO更新帮助执行pdo更新

2 个答案: