PHP/mysql：使用数组查询MySQL并在数组中获取结果

我有一个数组$ scans。我想用该数组中的所有值查询MySQL，并将结果返回到数组中。例如，在扫描样本数据将是：PHP/mysql：使用数组查询MySQL并在数组中获取结果

E1234 
E2244 
E3654

MySQL表PARTS具有字段part, size, length, plate, side, type。

我想结束$output["E1234"][0]是该部分的大小结果，1是长度等，我希望数组可以通过MYSQL查询进行排序。（订购SIDE desc, PLATE asc）。

现在，我只是通过$SCANS数组并在查询后进行查询，但是我无法正确地对所有结果进行排序。

这可能吗？这就是我现在正在做的事情，但很明显，因为每个查询返回一行然后输出，所以没有排序功能。我希望能够执行一个查询，对数组中的结果进行排序，然后在排序后输出该数据。

foreach ($scans as $currentscan) { 
     $partselect = substr(mysql_real_escape_string($currentscan), 0, 5); 

     $query = "SELECT french, length, plate, side, type FROM parts WHERE part = '$partselect' ORDER BY side DESC, plate ASC LIMIT 1"; 
     $result = mysql_query($query); 
     #echo 'query is '.$query.' <br>'; 
     $error = mysql_error(); 
     $num_rows = mysql_num_rows($result); 
     if ($num_rows == 0) { 
      echo 'BAD PART: '.$currentscan.' '.$partselect.' error is '.$error.'<br \> 
      '; 
     } else { 
      $row = mysql_fetch_array($result); 
      print $partselect.' is a '.$row['french'].'/'.$row['length'].' - '.$row['type'].' - '.$row['plate'].'('.$row['side'].')<br \>'; 
     } 
    };

编辑：这是代码，因为它是现在以下一些建议在这里：

$scans = explode("\n",$_POST['scans']); 

foreach ($scans as $currentscan) { 
    if ($currentscan[0] == "E") { //this is a cheap trick to ignore a bad scan inherent in the scanning mechanism 
    $partselect = substr(mysql_real_escape_string($currentscan), 0, 5); 
    $tempQuery .= 'part = "'.$partselect.'" OR '; 

    }; 
};//end foreach 
$tempQuery = substr($tempQuery, 0, -3); //remove last OR (fixed substr to 0,-3 to scrip final OR - stephen) 
$tempQuery .= ") ORDER BY side DESC, plate ASC LIMIT 1"; //add on end of query 
$query = "SELECT french, length, plate, side, type FROM parts WHERE ".$tempQuery; 
$result = mysql_query($query); 
echo $result; 
while($row = mysql_fetch_array($result)){ 
    print $row['french']."/".$row['length']; //just doing something pointless to verify data was pulled. 
}

结果是：

警告：mysql_fetch_array（）：提供的参数不是一个有效的MySQL结果第35行的/home/foo/bar/sort.php中的资源

第35行是 while（$ row = mysql_fetch_array（$ result））{

FINAL编辑：

它的工作原理。

//DECLARED CONSTANTS// 

if (!$_POST) { // Have scans been entered? If not, display the form. 
print ' 
<html> 
<body> 
Scans: 
<form action="index.php" method="post"> 
<textarea rows="20" cols="6" name="scans" id="scans"> 
</textarea> 
<br /> 
<input type="submit" value="Submit" /> 
</body> 
</html> 
'; 
} else { //Scans have been entered. Start scan processing logic 

//==openDB==// 
mysql_connect(SQLSERVER, SQLUSER, SQLPASSWORD) or die("Can not connect to DB server."); 
mysql_select_db(DATABASE) or die("Can not connect to Database."); 
//==openDB==// 

$scans = explode("\n",$_POST['scans']); // Explode posted scans into scans array 

foreach ($scans as $currentscan) { // step through each scan 
    if ($currentscan[0] == "E") { //Cheap check for real part numbers. 
    $partselect = substr(mysql_real_escape_string($currentscan), 0, 5); // Strip off the extraneous data from the scan 
    $count{$partselect}++; //Count instances of particular parts. ideally this would be in an array in the form of $count[$partnumber] so I can easily display that data at the end. each part needs to be displayed every time it's scanned. 
    $tempQuery .= 'part = "'.$partselect.'" OR '; //Starts building query 

    }; 
};//end foreach 
$tempQuery = substr($tempQuery, 0, -3); //remove last OR 

$tempQuery .= ") ORDER BY side DESC, plate ASC"; //add on end of query 
$query = "SELECT part, french, length, plate, side, type FROM parts WHERE (".$tempQuery; //Form beginning of query 
$result = mysql_query($query);// execute query 
while($row = mysql_fetch_array($result)){ // step through results 
    for ($i = 0; $i < $count{$row['part']}; $i++) { //if a part was scanned $count{$row['part']} times, display it that many times 
    print $row['part']." ".$row['french']."/".$row['length']." ".$row['plate']."(".$row['side'].")<br>"; //data parsing goes here. this will be expanded. 
    };// close for loop 
};//close while loop   
};//close else 

?>

来源

2010-08-17 Screevo

让我们看看你的代码！ – BoltClock 2010-08-17 18:11:36

Stephen想要查看构建的查询。这可能不完全正确。在迭代之前，请检查num_rows以查看是否有结果。 – Chris 2010-08-17 20:45:54

<?php 
// Make a MySQL Connection 
$query = "SELECT * FROM example"; 

$result = mysql_query($query) or die(mysql_error()); 
$row = mysql_fetch_array($result) or die(mysql_error()); 
echo $row['name']. " - ". $row['age']; 

?>

礼貌的http://www.tizag.com/mysqlTutorial/mysqlfetcharray.php

您还可以，如果你希望多结果IN子句做：

<?php 
// Make a MySQL Connection 
$query = "SELECT * FROM example"; 

$result = mysql_query($query) or die(mysql_error()); 
while($row = mysql_fetch_array($result)){ 
    echo $row['name']. " - ". $row['age']; 
} 


?>

的评论添加代码：

foreach ($scans as $currentscan) { 
    $partselect = substr(mysql_real_escape_string($currentscan), 0, 5); 
    $tempQuery .= "(part = ".$partselect." OR"; 
}//end foreach 
$tempQuery = substr($tempQuery,-2); //remove last OR 
$tempQuery .= ") ORDER BY side DESC, plate ASC LIMIT 1"; //add on end of query 
$query = "SELECT french, length, plate, side, type FROM parts WHERE ".$tempQuery; 
$result = mysql_query($query); 
while($row = mysql_fetch_array($result)){ 
    //do something with row in result set... 
}

来源

2010-08-17 18:13:49 Chris

这不是我正在寻找的。更新代码示例更加清晰。 – Screevo 2010-08-17 18:19:20

@stephen我更新了你的代码，首先为$ scans数组中的所有项目构建查询，然后遍历结果集...... – Chris 2010-08-17 18:28:10

这似乎可以工作，但substr语法看起来不对，因为之后$ tempQuery =“R”（R和一个空格） – Screevo 2010-08-17 19:38:47

-1

MySQL Fetch Array Function

看你的更新/编辑后，您可以使用

// Represents your $scans array 
$arr = array('Hello','World!','Beautiful','Day!'); 

foreach ($arr as $currentscan) { 
    $partselect[] = substr(mysql_real_escape_string($currentscan), 0, 5); 
} 

$inExpr = implode("','",$partselect); 

$query = "SELECT french, length, plate, side, type FROM parts WHERE part IN('$inExpr') ORDER BY side DESC"; 

$result = mysql_query($query); 

while($row = mysql_fetch_array($result)) { 
    print $partselect.' is a '.$row['french'].'/'.$row['length'].' - '.$row['type'].' - '.$row['plate'].'('.$row['side'].')<br \>'; 
}

来源

2010-08-17 18:12:21

Whay你应该做的是构建PHP WHERE子句，它可以让你选择任何部件号的所有行。类似这样的：

$whereExpr = array(); 
for ($i = 0; $i < count($scans); $i++) { 
    $whereExpr[] = "part = \"{$scans[$i]}\""; 
} 

$whereExpr = implode(" OR ", $whereExpr); 

$query = "SELECT * FROM `parts` WHERE $whereExpr ORDER BY <whatev>"; 

$result = array(); 
while ($row = mysql_fetch_array) { 
    $result[ $row['part'] ] = $row; 
}

来源

2010-08-17 18:18:58 eliego

ooh。这会创建一个giganto查询。我喜欢这个。尝试它。 – Screevo 2010-08-17 18:21:05

如果这是用户为$ whereExpr生成的内容，那么你会打开你的数据库到SQL注入：http://en.wikipedia.org/wiki/SQL_injection – 2010-08-17 18:37:06

是的，当然你应该使用mysql_real_escape_string等等。这只是一些快速汇总的示例代码。 – eliego 2010-08-17 18:38:04

PHP/mysql：使用数组查询MySQL并在数组中获取结果

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