将变量从一个文件传递到另一个文件 (PHP)

所以我正在创建这个报告页面，用户可以在其中选择报告的类型和日期。单击提交按钮后，将显示 2 个新按钮，一个用于下载 excel 格式的报告，另一个用于下载 PDF 格式的报告。根据所选的报告类型，我有将处理报告的特定文件。我已经测试了特定文件，当我使用硬编码日期时，它们确实会正确生成报告。但我希望能够使用用户选择的日期。请查看我的代码，让我知道我缺少什么。谢谢！！

SAE报告.php：

<!DOCTYPE html>
<HTML lang="en">
<HEAD>
    <meta charset="utf-8">
    <link rel="stylesheet" href="css/style2.css">
    <TITLE>SAE Report</TITLE>
    <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
    <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<script>
$().ready(function() {
  $(".datepicker").datepicker({dateFormat:'yy-mm-dd'});
});
</script>
</HEAD>
<BODY>
<center>
<h1>SAE Report</h1>
</center>
 <form action = "" method = "post">
 <label>Report Type</label>
    <select id="report" name="report">
        <option value="none"></option>
        <option value="new">New SAEs Report</option>
        <option value="cumulative">Cumulative SAE Report</option>
    </select>
 <label>Start Date</label><input type="text" class="datepicker" name="start">
 <label>End Date</label><input type="text" class="datepicker" name="end">
 <input type="submit" name="submit" value="Submit">
 </form>
</BODY>
</HTML>
<?php
$type='';
$start='';
$end='';
if (isset($_post['submit'])){
    $type=$_post['report'];
    $start=$_post['start'];
    $end=$_post['end'];
    if ($type=="cumulative"){
        echo "<form action='cumulativeRptExcel2.php?='.$end. method='get' name ='xls'>";
        echo "<input type='submit' name='submitXLS' value='Download Excel'/>";
        echo "</form>";
        echo "<form action='$cumulativePDF' method='post' name ='xls'>";
        echo "<input type='submit' name='submitXLS' value='Download PDF'/>";
        echo "</form>";
    }
    elseif($type=='new' and $startdt!='' and $enddt!=''){
        echo "<form action='$newXLS' method='get' name ='xls'>";
        echo "<input type='submit' name='submitXLS' value='Download Excel'/>";
        echo "</form>";
        echo "<form action='$newPDF' method='get' name ='xls'>";
        echo "<input type='submit' name='submitXLS' value='Download PDF'/>";
        echo "</form>";
    }
    elseif($type="new" and ($start=='' or $end=='')){
        echo "You need to select START and END date for the report";
    }   
}
?>

我的累积RptExcel2.php的开始：

<?php
include ('connect.php');
$endDT='';
if (isset($_get['enddt'])){ 
   $endDT=$_get['enddt'];
}
$query="SELECT * from sae_cumulative_report2($endDT)";
$result = pg_query($db, $query);
...
?>

由于我无法生成按钮，因此用户可以选择他们想要的下载文件（xls 或 pdf）。现在，我最终只是自动下载了 Excel 文件。这是代码：

<!DOCTYPE html>
<HTML lang="en">
<HEAD>
    <meta charset="utf-8">
    <link rel="stylesheet" href="css/style2.css">
    <TITLE>SAE Report</TITLE>
    <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
    <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<script>
  $().ready(function() {
  $(".datepicker").datepicker({dateFormat:'yy-mm-dd'});
 });
</script>
</HEAD>
<BODY>
<center>
<h1>SAE Report</h1>
</center>
 <form action = "processReport.php" method = "GET">
 <label>Report Type</label>
    <select id="report" name="report">
        <option value="none"></option>
        <option value="new">New SAEs Report</option>
        <option value="cumulative">Cumulative SAEs Report</option>
    </select>
 <label>Start Date</label><input type="text" class="datepicker" name="start">
 <label>End Date</label><input type="text" class="datepicker" name="end">
 <input type="submit" name="submit" value="Submit">
 </form>
</BODY>

进程报告.php：

$type='';
$startdt='';
$enddt='';
if (isset($_GET['submit'])){
    $type=$_GET['report'];
    $startdt=$_GET['start'];
    $enddt=$_GET['end'];
    if ($type=="cumulative" and $enddt!=''){
        $query="SELECT * from sae_cum_decoded('$enddt')";
        $filename='SAE_CumulativeReport_';
        $insideTitle="Cumulative SAEs Report";
        processFile($db,$filename, $insideTitle,$query);
    }
    elseif($type=='new' and $startdt!='' and $enddt!=''){
        $query="SELECT * from sae_new_decoded('$startdt','$enddt')";
        $filename='SAE_NewReport_';
        $insideTitle="New SAEs Report";
        processFile($db,$filename, $insideTitle,$query);
    }
    else
        echo '<script language="javascript">';
        echo 'alert("In order to generate a report, a REPORT TYPE needs to be selected.nFor Cumulative SAEs Report, END DATE is required.nFor New SAEs Report, START DATE and END DATE are required.")
        window.location.href="saereport5.php"';
        echo '</script>';

}
function processFile($db,$filename, $insideTitle, $query){
...}

弄清楚如何使用按钮执行此操作会很好，因为将来用户将需要同时拥有这两个选项。

代码前的几条注释：

变量名称区分大小写。使用 $_POST 而不是 $_post ，如@toh19所述;
参考： http://php.net/manual/en/language.variables.basics.php
不要直接信任用户输入。在这种情况下，为了更安全，您可以根据正则表达式验证用户输入。
参考： http://www.phptherightway.com/#data_filtering

代码：

<!DOCTYPE html>
<HTML lang="en">
    <HEAD>
        <meta charset="utf-8">
        <link rel="stylesheet" href="css/style2.css">
        <TITLE>
            SAE Report
        </TITLE>
        <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
        <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
        <script>
            $().ready(function() {
                $(".datepicker").datepicker({
                    dateFormat:'yy-mm-dd'}
                                           );
            }
                     );
        </script>
    </HEAD>
    <BODY>
        <center>
            <h1>
                SAE Report
            </h1>
        </center>
        <form action = "" method = "post">
            <label>Report Type</label>
            <select id="report" name="report">
                <option value="none"></option>
                <option value="new">New SAEs Report</option>
                <option value="cumulative">Cumulative SAE Report</option>
            </select>
            <label>Start Date</label>
            <input type="text" class="datepicker" name="start">
            <label>End Date</label>
            <input type="text" class="datepicker" name="end">
            <input type="submit" name="submit" value="Submit">
        </form>
    </BODY>
</HTML>
<?php
$type='';
$start='';
$end='';
if (isset($_POST['submit'])){
    $type=$_POST['report'];
    $start=$_POST['start'];
    $end=$_POST['end'];
    if ( $type == 'cumulative') {
        echo "<form action='cumulativeRptExcel2.php?&enddt=$end' method='POST' name='xls'>";
        echo "<input type='submit' name='submitXLS' value='Download Excel'/>";
        echo "</form>";
        echo "<form action='$cumulativePDF' method='post' name ='xls'>";
        echo "<input type='submit' name='submitXLS' value='Download PDF'/>";
        echo "</form>";
    }
    elseif ($type == 'new') {
        if (empty($start) || empty($end)) {
            die("You need to select START and END date for the report");
        }
        echo "<form action='$newXLS' method='get' name ='xls'>";
        echo "<input type='submit' name='submitXLS' value='Download Excel'/>";
        echo "</form>";
        echo "<form action='$newPDF' method='get' name ='xls'>";
        echo "<input type='submit' name='submitXLS' value='Download PDF'/>";
        echo "</form>";
    }
}

更新

以前的代码中存在语法问题（在累积类型的表单操作中）;
如果要通过查询字符串（cumulativeRptExcel2.php?&enddt=...）传递变量，则必须将形式METHOD更改为POST，否则（GET方法）您需要为enddt值创建一个隐藏字段;

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