Question

我长期坚持这个问题并试图寻找解决方案，但无法弄明白。我有输入字段，其中用户将键入已存在于事件表中的Occation名称，然后我编写了php代码，以便显示该occationname的整行。下面是我的代码，我总是得到表的第一行（这意味着它没有进行检查或WHERE条件）。我试图分配$ X值，如： $ X = gh（gh是表中存在的名称），它完美地运行。似乎php是在页面加载时执行的，意味着在用户输入输入值之前。（但这没有任何意义，为什么它显示第一行呢？）

注意：我使用if（issset（$ _ POST [＆＃39; s＆＃39;]）来获取用户是否点击按钮，但是因为在点击

之前执行了php代码它无效

＆＃13;

function GetI()
{
 var x = document.getElementById("tt").value;
    document.getElementById("tvalue").value = x ;
  
  
}

＆＃13;

<input  type="text" id="tt" value="" class="contactField"/> </br>
       <input type="submit"  class="pageapp-login-button button button-small button-green button-fullscreen " style="font-size:13px" value="getValue" onclick="GetI()" />

<form  method="post" name="addingform1" id="addingform1"     action="testing.php" >
  <!-- Here in tvalue, I just show this input to make sure the variable is copying the same input that user typed -->
      <input  type="text" id="tvalue" value="" class="contactField"/>
  <input type="submit" name="s" class="pageapp-login-button button button-small button-green button-fullscreen " style="font-size:13px" value="Fordata"/>
 
<?php header("Content-type: text/html; charset=utf-8");
if(isset($_POST['s']))
  $X= $_POST['tvalue'];
include('database/connect-mysql.php');

mysql_query("set character_set_server='utf8'");
mysql_query("set names 'utf8'");


$sqls = "SELECT  Date, Address, City, TotalGuest FROM Events WHERE OccationName = '$X'";
echo " <table id='tid'style= 'border-collapse: collapse;
    border-spacing: 0;
    width: 100%;
    border: 1px solid #ddd;
    position:absolute;
           top:20%;
           right:20%; 
'> 
<th><div style='overflow: auto; height: 30px; width: 100px;'>Date</th>
<th><div style='overflow: auto; height: 30px; width: 100px;'>Address</th>
<th><div style='overflow: auto; height: 30px; width: 100px;'>City</th>
<th><div style='overflow: auto; height: 30px; width: 100px;'>TotalGuest</th>
</tr>
";
 


foreach ($dbcon->query($sqls) as $row){
echo "<tr >";
echo "<td>" . $row['Date'] . "</td>";
echo "<td>" . $row['Address'] . "</td>";
echo "<td>" . $row['City'] . "</td>";
echo "<td>" . $row['TotalGuest'] . "</td>";
echo "</tr>";
}


   
      
    ?>


    
</form>

＆＃13;

Answer 1

哇这个代码有很多问题。我会查看/ var / logs / httpd，看看你做错了什么。

无论其
第一个问题是您的<input>字段没有name='tvalue'或类似的内容。您无法使用$_POST['tvalue']

第二个问题（我相信）是查询的foreach。我不知道您可以使用foreach翻转数据库，通常是在while循环中执行。

Answer 2

正如其他人所说，你应该使用Mysqli。无论这里是答案，我希望你从中学习。

<?php

$form = "
<form id=\"addingform1\" action=\"testing.php\" name=\"addingform1\" method=\"post\">
    <input id=\"tvalue\" type=\"text\" class=\"contactField\" value=\"".$xvar."\"/>
    <input type=\"submit\" name=\"s\" class=\"pageapp-login-button button button-small button-green button-fullscreen \" style=\"font-size:13px\" value=\"Fordata\"/>
</form>";

IF (isset($_POST['s'])) { // form has been submitted

    $err = ""; // form errors

    // Associate and Sanitize form variables
    $xvar = htmlspecialchars(strip_tags(trim($_POST['tvalue'])));

    // Validate form variables
    IF (empty($xvar)) { $err .="- tvalue is empty"; }

    IF (!empty($err)) {

        echo($err); // display errors

        // display the form
        echo($form);


    }ELSE{ // no errors

        // DB connection -- only include/establish when needed.
        include('database/connect-mysql.php');
        mysql_query("set character_set_server='utf8'");
        mysql_query("set names 'utf8'");

        $_xvar = mysql_real_escape_string($xvar);
        $result = "";

        // sql
        $sql = "SELECT Date, Address, City, TotalGuest FROM Events WHERE OccationName = '$_xvar'";
        $query = $dbcon->query($sql);
        IF ($query) {

            While ($row = mysql_fetch_array($query)) {

                // Loop through and build tr rows.
                $result .= "<tr><td>".$row['Date']."</td><td>".$row['Address']."</td><td>".$row['City']."</td><td>".$row['TotalGuest']."</td></tr>";

            }
            mysql_free_result($result);

        }ELSE{

            // No results from query
            $result .= "<tr><td colspan=\"4\">No results for ".$xvar."</td></tr>";

        }
        mysql_close($dbcon); // close your db connection


        // Display results
        echo("\n
<table id=\"tid\" > 
    <th><div style=\"overflow: auto; height: 30px; width: 100px;\">Date</th>
    <th><div style=\"overflow: auto; height: 30px; width: 100px;\">Address</th>
    <th><div style=\"overflow: auto; height: 30px; width: 100px;\">City</th>
    <th><div style=\"overflow: auto; height: 30px; width: 100px;\">TotalGuest</th>
</tr>
".$result."
</table>");

    }

}ELSE{
    // Form has not been submitted, thus show the form.
    echo($form);
}
?>

从输入字段获取变量值并在SELECT-WHERE语句PHP中使用它

2 个答案: