Php 循环中显示错误数据的循环_Php_Loops_Pdf

Php 循环中显示错误数据的循环

php loops pdf

Php 循环中显示错误数据的循环,php,loops,pdf,Php,Loops,Pdf,我有一个按列表分类的PDF文件列表像这样： Terms: PDF1.pdf PDF2.pdf Conditions: PDF1.pdf PDF3.pdf 因此，我首先循环所有类别以显示页面上类别的标题，并在该循环中循环pdf文件URL（仅出于测试目的，最终代码将获得锚定标记等）问题是我的代码显示了所有标题上的所有pdf文件。不仅仅是属于他们的pdf文件。我做错了什么？每次循环后是否需要清空$attach 我的代码： foreach($manualcr as $mantitle){ i

我有一个按列表分类的PDF文件列表

像这样：

Terms:
PDF1.pdf
PDF2.pdf

Conditions:
PDF1.pdf
PDF3.pdf

因此，我首先循环所有类别以显示页面上类别的标题，并在该循环中循环pdf文件URL（仅出于测试目的，最终代码将获得锚定标记等）

问题是我的代码显示了所有标题上的所有pdf文件。不仅仅是属于他们的pdf文件。我做错了什么？每次循环后是否需要清空

$attach

我的代码：

foreach($manualcr as $mantitle){
  if($mantitle['id'] != ''){
    $attachoverzicht .= '<h3>'.$mantitle['title'].'</h3>';
    foreach($manucr as $attach){
      if($attach['id'] != ''){
        $attachoverzicht .= '<li>'.$attach['url'].'</li>';
      }
    }
  }
}
echo $attachoverzicht;

以及

$manucr

    array(4) {
  [0]=>
  array(26) {
    ["id"]=>
    string(1) "1"
    ["filename"]=>
    string(13) "dummy_pdf.pdf"
    ["filename_sys"]=>
    string(71) "/home/website/public_html/cms/attachments/article/182/dummy_pdf.pdf"
    ["file_type"]=>
    string(15) "application/pdf"
    ["file_size"]=>
    string(5) "16555"
    ["url"]=>
    string(37) "attachments/article/182/dummy_pdf.pdf"
    ["uri_type"]=>
    string(4) "file"
    ["url_valid"]=>
    string(1) "0"
    ["url_relative"]=>
    string(1) "0"
    ["url_verify"]=>
    string(1) "0"
    ["display_name"]=>
    string(9) "Test naam"
    ["description"]=>
    string(0) ""
    ["icon_filename"]=>
    string(7) "pdf.gif"
    ["access"]=>
    string(1) "2"
    ["state"]=>
    string(1) "0"
    ["user_field_1"]=>
    string(0) ""
    ["user_field_2"]=>
    string(0) ""
    ["user_field_3"]=>
    string(0) ""
    ["parent_type"]=>
    string(11) "com_content"
    ["parent_entity"]=>
    string(7) "article"
    ["parent_id"]=>
    string(3) "182"
    ["created"]=>
    string(19) "2017-02-16 13:56:03"
    ["created_by"]=>
    string(3) "360"
    ["modified"]=>
    string(19) "2017-02-16 13:56:03"
    ["modified_by"]=>
    string(3) "360"
    ["download_count"]=>
    string(1) "0"
  }
  [1]=>
  array(26) {
    ["id"]=>
    string(1) "2"
    ["filename"]=>
    string(14) "dummy_pdf1.pdf"
    ["filename_sys"]=>
    string(72) "/home/website/public_html/cms/attachments/article/182/dummy_pdf1.pdf"
    ["file_type"]=>
    string(15) "application/pdf"
    ["file_size"]=>
    string(5) "16555"
    ["url"]=>
    string(38) "attachments/article/182/dummy_pdf1.pdf"
    ["uri_type"]=>
    string(4) "file"
    ["url_valid"]=>
    string(1) "0"
    ["url_relative"]=>
    string(1) "0"
    ["url_verify"]=>
    string(1) "0"
    ["display_name"]=>
    string(0) ""
    ["description"]=>
    string(0) ""
    ["icon_filename"]=>
    string(7) "pdf.gif"
    ["access"]=>
    string(1) "2"
    ["state"]=>
    string(1) "0"
    ["user_field_1"]=>
    string(0) ""
    ["user_field_2"]=>
    string(0) ""
    ["user_field_3"]=>
    string(0) ""
    ["parent_type"]=>
    string(11) "com_content"
    ["parent_entity"]=>
    string(7) "article"
    ["parent_id"]=>
    string(3) "182"
    ["created"]=>
    string(19) "2017-02-16 13:56:39"
    ["created_by"]=>
    string(3) "360"
    ["modified"]=>
    string(19) "2017-02-16 13:56:39"
    ["modified_by"]=>
    string(3) "360"
    ["download_count"]=>
    string(1) "0"
  }
  [2]=>
  array(26) {
    ["id"]=>
    string(1) "3"
    ["filename"]=>
    string(13) "dummy_pdf.pdf"
    ["filename_sys"]=>
    string(71) "/home/website/public_html/cms/attachments/article/181/dummy_pdf.pdf"
    ["file_type"]=>
    string(15) "application/pdf"
    ["file_size"]=>
    string(5) "16555"
    ["url"]=>
    string(37) "attachments/article/181/dummy_pdf.pdf"
    ["uri_type"]=>
    string(4) "file"
    ["url_valid"]=>
    string(1) "0"
    ["url_relative"]=>
    string(1) "0"
    ["url_verify"]=>
    string(1) "0"
    ["display_name"]=>
    string(0) ""
    ["description"]=>
    string(0) ""
    ["icon_filename"]=>
    string(7) "pdf.gif"
    ["access"]=>
    string(1) "2"
    ["state"]=>
    string(1) "0"
    ["user_field_1"]=>
    string(0) ""
    ["user_field_2"]=>
    string(0) ""
    ["user_field_3"]=>
    string(0) ""
    ["parent_type"]=>
    string(11) "com_content"
    ["parent_entity"]=>
    string(7) "article"
    ["parent_id"]=>
    string(3) "181"
    ["created"]=>
    string(19) "2017-02-16 13:56:55"
    ["created_by"]=>
    string(3) "360"
    ["modified"]=>
    string(19) "2017-02-16 13:56:55"
    ["modified_by"]=>
    string(3) "360"
    ["download_count"]=>
    string(1) "0"
  }
  [3]=>
  NULL
}

从您的

var\u dump

输出中，我假设您对应的字段是

$mantitle['id']

和

$attach['parent\u id']

您必须在第二个循环中检查这一点，例如：

foreach($manualcr as $mantitle){
  if($mantitle['id'] != ''){
    $attachoverzicht .= '<h3>'.$mantitle['title'].'</h3>';
    foreach($manucr as $attach){
      if($attach['id'] != '' && $attach['parent_id'] == $mantitle['id']){ // Check for condition added here
        $attachoverzicht .= '<li>'.$attach['url'].'</li>';
      }
    }
  }
}
echo $attachoverzicht;

foreach（$manualcr作为$mantitle）{
如果（$mantitle['id']！=''）{
$attachoverzicht.='.$mantitle['title'.'”；
foreach（$manucr作为$attach）{
如果（$attach['id']！=''&&$attach['parent_id']==$mantitle['id']）{//检查此处添加的条件
$attachoverzicht.='。$attach['url'].；
}
}
}
}
echo$attachoverzicht；

能否显示

var\u dump（$manualcr）的输出和变量转储（$manucr）？您似乎没有检查您的$manucr
类别与您的$manualcr
类别相同的情况。是的，我会将它们添加到我的问题中@Roberto06您是否至少可以将数据库访问调用更改为mysqli_fetch_assoc（）
，或者如果使用PDO:：fetch_assoc进行PDO fetch，则数组中只包含每列数据的一次出现。这将使您的代码内存使用率下降，谢谢，这是非常有意义的。
foreach($manualcr as $mantitle){
  if($mantitle['id'] != ''){
    $attachoverzicht .= '<h3>'.$mantitle['title'].'</h3>';
    foreach($manucr as $attach){
      if($attach['id'] != '' && $attach['parent_id'] == $mantitle['id']){ // Check for condition added here
        $attachoverzicht .= '<li>'.$attach['url'].'</li>';
      }
    }
  }
}
echo $attachoverzicht;