Php 在运行查询之前检查文件是否存在
我是新手，请原谅我的无知 我有一个上传PDF表单，我检查表单是否已经存在，如果它不存在，我上传它，因此希望运行mysql插入查询。我试过这个：Php 在运行查询之前检查文件是否存在,php,mysql,if-statement,Php,Mysql,If Statement,我是新手，请原谅我的无知 我有一个上传PDF表单，我检查表单是否已经存在，如果它不存在，我上传它，因此希望运行mysql插入查询。我试过这个： if (file_exists($pdfSubDirectory.$filename)) if (isset($_POST['submit'])) { $quer->execute(); } 但是我得到了错误 >致命错误：对非对象调用成员函数execute（） 有什么想法吗 我的主要代码是 <?p
if (file_exists($pdfSubDirectory.$filename))
if (isset($_POST['submit']))
{
$quer->execute();
}
<?php
require "config.php";
$cat = $_GET['cat1'];
$catid = $_GET['cat'];
$subcat = $_GET['subcat'];
$subcatid = $_GET['subcatid'];
$subcat2 = $_GET['subcat2'];
//form vars
$form_class = $_POST['Class']; // create modify delete flag
$form_cerfa = $_POST['Cerfa']; // cerfa Yes or No flag
$form_id = $_POST['ID'];
$form_name = $_POST['Name'];
$predir = "./docs";
$dir = $predir."/" .$cat. "/" .$subcat."/" .$subcat2 . "/";
$dir= strtolower($dir);
$dir= str_replace(' ', '_', $dir);
$MyHtml1 = <<<EOD
<!doctype html>
<html>
<head>
<title>$subcat / $subcat2</title>
</head>
<body>
<table align="center" border="0" cellpadding="1" cellspacing="1" style="height: 100%; width: 100%;">
<tbody>
<tr>
<td>
<table border="0" cellpadding="0" cellspacing="0" style="height: 100%; width: 100%;">
<tbody>
<tr>
<td style="width: 50%;">
<table border="0" cellpadding="0" cellspacing="0" style="width: 100%;">
<tbody>
<tr>
<td style="width: 50%;">You are in the category:</td>
<td style="width: 50%;">$cat</td>
</tr>
<tr>
<td>You are in the subcategory:</td>
<td>$subcat</td>
</tr>
<tr>
<td>You are in section:</td>
<td>$subcat2</td>
</tr>
</tbody>
</table>
</td>
<td>
<p>Time:</p>
<p>Date:</p>
</td>
</tr>
<tr>
<td colspan="2">
<hr />
<p>...</p>
</td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
EOD;
echo $MyHtml1;
$pdfDirectory = $dir;
$pdfSubDirectory = $pdfDirectory.$_POST['Class']."/";
$thumbDirectory = $pdfDirectory . "pdfimage/";
$filename = basename( $_FILES['pdf']['name'], ".pdf");
$filename = preg_replace("/[^A-Za-z0-9_-]/", "", $filename).".pdf";
$thumb = basename($filename, ".pdf");
if (file_exists($pdfSubDirectory.$filename)) {
echo "This file already exists.";
} else {
if(move_uploaded_file($_FILES['pdf']['tmp_name'], $pdfSubDirectory.$filename)) {
//the path to the PDF file
$pdfWithPath = $pdfDirectory.$filename;
$pdfWithSubPath = $pdfSubDirectory.$filename;
$pdfWithPathImage = $pdfDirectory."pdfimage/";
$pdfWithPathImageThumb = $pdfWithPathImage.$thumb.".jpg";
//add the desired extension to the thumbnail
$thumb = $thumb.".jpg";
//execute imageMagick's 'convert', setting the color space to RGB and size to 200px wide
//exec("convert \"{$pdfWithSubPath}[0]\" -colorspace RGB -geometry 100 $thumbDirectory$thumb");
exec("convert -density 200 -page 792x612 \"{$pdfWithSubPath}[0]\" -append -resize 240 -background white -flatten +repage $thumbDirectory$thumb");
//show the image
echo "<p><a href=\"$pdfWithPath\"><img src=".$pdfWithPathImageThumb." alt=\"\" /></a></p>";
echo $pdfWithPathImageThumb;
}
}
if (isset(file_exists($pdfSubDirectory.$filename)))
{
$quer->execute();
}
///////// start of query for form addition//////////
$quer = $dbo -> prepare("INSERT into form_detail(form_id,form_name,form_category,form_subcategory,form_subcategory2,form_class,form_cerfa) VALUES(:form_id,:form_name,:form_category,:form_subcategory,:form_subcategory2,:form_class,:form_cerfa)");
$quer ->bindParam(':form_id', $form_id);
$quer ->bindParam(':form_name', $form_name);
$quer ->bindParam(':form_category', $catid);
$quer ->bindParam(':form_subcategory', $subcatid);
$quer ->bindParam(':form_subcategory2', $subcat2);
$quer ->bindParam(':form_class', $form_class);
$quer ->bindParam(':form_cerfa', $form_cerfa);
///////////// End of query for form addition////////////
$MyHtml2 = <<<EOD
<form action="" method="post" enctype="multipart/form-data" name="MyForm">
<input type="file" name="pdf" /><br>
<table border="0" cellpadding="0" cellspacing="0" style="width: 500px;">
<tbody>
<tr>
<td><label>Cerfa : </label></td>
<td><input type="radio" name="Cerfa" value="1" checked="checked"/>Yes<input type="radio" name="Cerfa" value="0"/>No<br/></td>
</tr>
<tr>
<td><label>Form Class: </label></td>
<td><select name="Class">
<option value="create">Create</option>
<option value="modify">Modify</option>
<option value="delete">Delete</option>
</select></td>
</tr>
<tr>
<td> <label>Form Name: </label></td>
<td><input type="text" name="Name" value="Name"/><br></td>
</tr>
<tr>
<td><label>Form Reference No : </label></td>
<td><input type="text" name="ID" value="Reference Number"/></td>
</tr>
<tr>
<td>Check details and upload</td>
<td><input type="submit" name="submit" value="Upload"/></td>
</tr>
</tbody>
</table>
</form>
<table border="0" cellpadding="0" cellspacing="0" style="width: 937px;">
<tbody>
<tr>
<td colspan="2">
<p>Forms Available</p>
</td>
</tr>
</tbody>
</table>
<table border="1" cellpadding="0" cellspacing="0" style="height: 44px; width: 100%;">
<tbody>
<tr>
<td style="vertical-align: middle; width: 228px;">Ref</td>
<td rowspan="1" style="vertical-align: middle; width: 89px;">Cerfa</td>
<td colspan="3" rowspan="1" style="vertical-align: middle; width: 595px;">Name</td>
</tr>
<tr>
<td style="vertical-align: middle; width: 228px;"> </td>
<td rowspan="1" style="text-align: center; vertical-align: middle;"> </td>
<td colspan="3" rowspan="1" style="text-align: center; vertical-align: middle;"> </td>
</tr>
</tbody>
</table>
<p> </p>
</body>
</html>
EOD;
echo $MyHtml2;
$it = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($dir."create/"));
while($it->valid()) {
if (!$it->isDot()) {
echo 'File Name: ' . $it->getSubPathName() . "\n<br>";
}
$it->next();
}
?>
您需要在执行之前准备$query
。把这个密码
///////// start of query for form addition//////////
$quer = $dbo -> prepare("INSERT into form_detail(form_id,form_name,form_category,form_subcategory,form_subcategory2,form_class,form_cerfa) VALUES(:form_id,:form_name,:form_category,:form_subcategory,:form_subcategory2,:form_class,:form_cerfa)");
$quer ->bindParam(':form_id', $form_id);
$quer ->bindParam(':form_name', $form_name);
$quer ->bindParam(':form_category', $catid);
$quer ->bindParam(':form_subcategory', $subcatid);
$quer ->bindParam(':form_subcategory2', $subcat2);
$quer ->bindParam(':form_class', $form_class);
$quer ->bindParam(':form_cerfa', $form_cerfa);
///////////// End of query for form addition////////////
除此之外：
if (file_exists($pdfSubDirectory.$filename))
if (isset($_POST['submit']))
{
$quer->execute();
}
当脚本运行时，它会进入if（file_exists（$pdfSubDirectory.$filename））
，发现它是真的，并尝试执行一个不存在的查询。哪里定义了$query？你能显示该代码吗？为什么要投-1票？这真的是一个愚蠢的问题吗？在定义$quer之前，您正在使用它。错误已经消失，但它会将它添加到mysql表中。如果表单存在，如何停止添加它？等等，如果表单确实存在，停止添加？如果这是您想要的，请将If条件更改为If（！file_exists（$pdfSubDirectory.$filename））
该过程是选择file，单击upload，它检查是否存在，它说“file exists”，否则它将添加它，然后应将表单详细信息添加到mysql表我找到答案，我删除了If（file_exists（$pdfSubDirectory.$filename））如果（设置（$_POST['submit']）{$query->execute（）；}并放置$query->execute（）；在echo$pdfWithPathImageThumb行之后；