Question

我试图从mysql查询返回的数组中返回一个特定的值。我不确定它会被称为什么，我猜它是一个多维关联数组，请纠正我，如果我错了。

我的PHP脚本

$query = "SELECT * FROM flws ORDER BY day LIMIT 1,5";

$query_run = mysql_query($query);

if($query_run){
$flws = array();

while($row = mysql_fetch_assoc($query_run)){
    $flws[] = $row;
}

var_dump($flws);
//echo $flws[1];

 } else{echo "broken query";}

$ flws的var转储返回：

array（5）{[0] =＆gt; array（8）{[“day”] =＆gt; string（1）“2”[“openday”] =＆gt; string（4）“5.47”[“highday”] =＆gt; string（4）“5.54”[“lowday”] =＆gt; string（4）“5.41”[“closeday”] =＆gt; string（4）“5.48”[“volumeday”] =＆gt; string（5）“76700”[“adjday”] =＆gt; NULL [“deviationday”] =＆gt; NULL} [1] =＆gt; array（8）{[“day”] =＆gt; string（1）“3”[“openday”] =＆gt; string（4）“5.38”[“highday”] =＆gt; string（4）“5.47”[“lowday”] =＆gt; string（4）“5.29”[“closeday”] =＆gt; string（4）“5.44”[“volumeday”] =＆gt; string（5）“68000”[“adjday”] =＆gt; NULL [“deviationday”] =＆gt; NULL} [2] =＆gt; array（8）{[“day”] =＆gt; string（1）“4”[“openday”] =＆gt; string（4）“5.50”[“highday”] =＆gt; string（4）“5.50”[“lowday”] =＆gt; string（4）“5.36”[“closeday”] =＆gt; string（4）“5.39”[“volumeday”] =＆gt; string（6）“247500”[“adjday”] =＆gt; NULL [“deviationday”] =＆gt; NULL} [3] =＆gt; array（8）{[“day”] =＆gt; string（1）“5”[“openday”] =＆gt; string（4）“5.10”[“highday”] =＆gt; string（4）“5.46”[“lowday”] =＆gt; string（4）“4.99”[“closeday”] =＆gt; string（4）“5.44”[“volumeday”] =＆gt; string（6）“472300”[“adjday”] =＆gt; NULL [“deviationday”] =＆gt; NULL} [4] =＆gt; array（8）{[“day”] =＆gt; string（1）“6”[“openday”] =＆gt; string（4）“5.10”[“highday”] =＆gt; string（4）“5.15”[“lowday”] =＆gt; string（4）“5.00”[“closeday”] =＆gt; string（4）“5.10”[“volumeday”] =＆gt; string（6）“115200”[“adjday”] =＆gt; NULL [“deviationday”] =＆gt; NULL}

我不确定如何从结果数组中返回特定值。

Answer 1

您将获得多个highday值。我只是打印它，您将highday中的所有$arrHighDay值作为数组：

$query = "SELECT * FROM flws ORDER BY day LIMIT 1,5";

$query_run = mysql_query($query);

if($query_run){
   $flws = array();

   while($row = mysql_fetch_assoc($query_run)){
      echo $row['highday']; //print value
      $arrHighDay[] = $row['highday']; // assign in an array
   }

print_r($arrHighDay);// you can return this array 

else{
      echo "broken query";
}

在您退回的页面中，您可以获得以下所有日期：

foreach($arrHighDay as $a){
   echo $a['highday'];
}

Answer 2

访问这样的数组值：

echo $flws['highday'];

它会回显highday的价值。

while($row = mysql_fetch_assoc($query_run)){
    $flws[] = $row['highday'];
}

现在，数组$flws包含所有列highday值。

解析从数据库返回的多级关联数组

2 个答案: