嘿伙计们,我很难用似乎相当容易。让我告诉你我正在尝试做什么,然后我将粘贴我的评论代码。
我想:
mysql_insert_id()
] 这是所有地狱都崩溃的地方。
我认为实际发生的是:
INSERT查询会针对每个步骤(上传,jcrop和缩略图显示)重复执行,因此它会插入3个值。所以会发生的事情是它[最初]上传的图像名称为3,但查找图像4以创建缩略图,然后显示错误的页面(应该显示缩略图)将另一行插入MySQL。完成所有这些后,下次我要上传图片时,它会给出初始上传ID为6。
我一直在疯狂,试图使用不同的插入行的方法,但似乎文件名没有使用任何其他方法传递到每个步骤。我尝试过使用:
include_once方法插入行
将流程分为2页, 第一页插入一行, 然后使用隐藏字段
这是我的代码:
<?php
//connect to MySQL
$dbname = "****";
$username = "****";
$password = "****";
$hostname = "localhost";
//connection to the database
$dbhandle = mysql_connect($hostname, $username, $password)
or die("<br/><h1>Unable to connect to MySQL, please contact support at support@michalkopanski.com</h1>");
//select a database to work with
$selected = mysql_select_db($dbname, $dbhandle)
or die("Could not select database.");
//insert an auto_incrementing value into the 'pictures' table
if (!$result = mysql_query("INSERT INTO `pictures` VALUES ('')"))
echo 'mysql error: '.mysql_error();
$filename = mysql_insert_id();
?>
<?php
//submit coordinates of jcrop preview
if ($_POST['submit_coords'])
{
$targ_w = 180; // desired width of thumbnail
$targ_h = 60; // desired height of thumbnail
$jpeg_quality = 90; // desired jpeg quality
$src = 'f/'.$filename.'.jpg'; // get path to the resized image
// Fetch the uploaded jpeg file
$img_r = imageCreateFromJpeg($src);
//Use these proportions
$dst_r = ImageCreateTrueColor( $targ_w, $targ_h );
// Get coordinates from jcop, and create thumbnail
imagecopyresampled($dst_r,$img_r,0,0,$_POST['x'],$_POST['y'], $targ_w,$targ_h,$_POST['w'],$_POST['h']);
// save the thumbnail and echo the result
$output_file = 't/'.$filename.'.jpg';
imagejpeg($dst_r, $output_file, $jpeg_quality);
$results = <<<EOT
<img src="t/$filename.jpg"/>
EOT;
echo $results;
die();
}
// upload & resize mig image
if ($_POST['upload_image'] && $_FILES['image_upload'])
{
require_once '../lib/jcrop/class.upload.php';
$ih = new Upload($_FILES['image_upload']);
if ($ih->uploaded) {
//save full size
$ih->file_new_name_body = $filename;
$ih->file_new_name_ext = 'jpg';
$ih->image_resize = true;
$ih->image_x = 860;
$ih->image_ratio_y = true;
$ih->process('f/');
if ($ih->processed) {
$x = $ih->image_dst_x;
$y = $ih->image_dst_y;
echo 'image resized';
$ih->clean();
} else {
echo 'error : ' . $ih->error;
}
}
//if succesful show the thumbnail preview
$output = <<<EOT
<img src="f/$filename.jpg" id="jcrop" />
<br />
<div style="overflow: hidden; width: 180px; height: 60px;">
<img src="f/$filename.jpg" id="preview" />
</div>
EOT;
// Show uploaded image, and allow jcrop
$head = <<<EOT
<link rel="stylesheet" href="../lib/jcrop/jquery.Jcrop.css" type="text/css" />
<script type="text/javascript" src="../lib/jcrop/jquery.min.js"></script>
<script type="text/javascript" src="../lib/jcrop/jquery.Jcrop.min.js"></script>
<script>
$(function(){
function showPreview(coords)
{
var rx = 180 / coords.w;
var ry = 60 / coords.h;
$('#preview').css({
width: Math.round(rx * $x) + 'px',
height: Math.round(ry * $y) + 'px',
marginLeft: '-' + Math.round(rx * coords.x) + 'px',
marginTop: '-' + Math.round(ry * coords.y) + 'px'
});
};
function insertCoords(c)
{
$('#x').val(c.x);
$('#y').val(c.y);
$('#x2').val(c.x2);
$('#y2').val(c.y2);
$('#w').val(c.w);
$('#h').val(c.h);
};
$('#jcrop').Jcrop({
onChange: showPreview,
onSelect: insertCoords,
aspectRatio: 3
});
});
</script>
EOT;
}
?>
<html>
<head>
<?php if ($head) echo $head; ?>
</head>
<body>
<?php if (!$head) : ?>
<form action="" method="POST" enctype="multipart/form-data">
<input type="file" name="image_upload" />
<input type="submit" name="upload_image" value="click me" />
</form>
<?php else : ?>
<form action="" method="POST">
<input type="hidden" name="x" id="x" />
<input type="hidden" name="y" id="y" />
<input type="hidden" name="x2" id="x2" />
<input type="hidden" name="y2" id="y2" />
<input type="hidden" name="w" id="w" />
<input type="hidden" name="h" id="h" />
<input type="hidden" name="filename" id="filename" value="<?php echo $filename ?>" />
<input type="submit" name="submit_coords" value="gogo" />
</form>
<?php endif; ?>
<?php if ($output) echo $output; ?>
</body>
</html>
拜托,如果您能以任何方式提供帮助,或者至少提出替代解决方案,我将非常感谢。
提前非常感谢你。
答案 0 :(得分:4)
乍一看,我建议插入新行的顶行代码应该在上传代码之前。即在以下之后:
if ($_POST['upload_image'] && $_FILES['image_upload'])
{
require_once '../lib/jcrop/class.upload.php';
//connect to MySQL
$dbname = "****";
$username = "****";
$password = "****";
$hostname = "localhost";
//connection to the database
$dbhandle = mysql_connect($hostname, $username, $password)
or die("<br/><h1>Unable to connect to MySQL, please contact support at support@michalkopanski.com</h1>");
//select a database to work with
$selected = mysql_select_db($dbname, $dbhandle)
or die("Could not select database.");
//insert an auto_incrementing value into the 'pictures' table
if (!$result = mysql_query("INSERT INTO `pictures` VALUES ('')"))
echo 'mysql error: '.mysql_error();
$filename = mysql_insert_id();
然后就在
之下if ($_POST['submit_coords'])
{
应该是
$filename = $_POST['filename'];
答案 1 :(得分:0)
从我收集的内容中,对于三个操作中的每个操作都会调用整个脚本,然后通过if语句(包括$ _POST变量)决定要做什么。这样,对于每个调用,您执行插入操作,这就是为什么有3个值而不是一个值。
您应该将MySQL INSERT查询移动到第一个if执行的分支,然后将某种引用(很可能是id)返回给浏览器,然后将其传递回服务器以执行以下步骤。不要忘记每次验证此引用。