检查是否在php中的字段数组中选择了文件

我必须更新由多个文件输入类型字段组成的数据库。 所有输入字段的名称都相同

<input type="text" name="title[]">
<input type="file" name="image[]">
<input type="text" name="title[]">
<input type="file" name="image[]">
<input type="text" name="title[]">
<input type="file" name="image[]">

---

第二个输入字段中的选定图像

首先，如果（$upload=1），则需要将代码中的

=

更改为

=

。因为

=

是

赋值

运算符而不是

比较

运算符

检查一下，也许你的问题已经解决了。否则，请检查以下可能的解决方案

1.

<?php
  $title = $_POST['title'];

for($i=0; $i<sizeof($title); $i++)
{
   if(!empty($_FILES['image']['name'][$i]))
   {
       // check if file uploaded then run below query
        $qry = "UPDATE <table_name> SET title='$title[$i]', image='$image' WHERE <match found>"; // you can apply if else here based on move_uploaded_file output       
   } else {
       // set flag upload=0
        $qry = "UPDATE <table_name> SET title='$title[$i]' WHERE <match found>";
   }
}
?>

<?php
  $title = $_POST['title'];
    $upload = 0; // define here
for($i=0; $i<sizeof($title); $i++)
{
   if(!empty($_FILES['image']['name'][$i]))
   {
       // upload file and set flag $upload = 1
   } else {
       // set flag $upload = 0
   }

   if($upload == 1) // you need to change = (assignment) to  == (comparision)
   {
      $qry = "UPDATE <table_name> SET title='$title[$i]', image='$image' WHERE <match found>";
      // execute $qry
   } else {
      $qry = "UPDATE <table_name> SET title='$title[$i]' WHERE <match found>";
      // execute $qry
   }
}
?>

---

我已经更正了有问题的代码（那是打字错误）。实际上，我试着在if条件下打印
echoif（！empty（$_FILES['image'][$i]）{echo'in if condition…'；}
中的code>if（！empty（$_FILES['image'][$i]）{echo'in if condition…}

但它不打印任何内容..首先尝试检查

echo'；打印（美元文件）在任何条件之前。并检查显示的内容？我已经用
print\r（$\u文件）的结果更新了问题
。您还必须在那里添加
['name']
。请检查我编辑的答案
<?php
  $title = $_POST['title'];

for($i=0; $i<sizeof($title); $i++)
{
   if(!empty($_FILES['image']['name'][$i]))
   {
       // check if file uploaded then run below query
        $qry = "UPDATE <table_name> SET title='$title[$i]', image='$image' WHERE <match found>"; // you can apply if else here based on move_uploaded_file output       
   } else {
       // set flag upload=0
        $qry = "UPDATE <table_name> SET title='$title[$i]' WHERE <match found>";
   }
}
?>

<?php
  $title = $_POST['title'];
    $upload = 0; // define here
for($i=0; $i<sizeof($title); $i++)
{
   if(!empty($_FILES['image']['name'][$i]))
   {
       // upload file and set flag $upload = 1
   } else {
       // set flag $upload = 0
   }

   if($upload == 1) // you need to change = (assignment) to  == (comparision)
   {
      $qry = "UPDATE <table_name> SET title='$title[$i]', image='$image' WHERE <match found>";
      // execute $qry
   } else {
      $qry = "UPDATE <table_name> SET title='$title[$i]' WHERE <match found>";
      // execute $qry
   }
}
?>