Question

我正在尝试将上传的文件放入循环中以减少代码。

<input type="file" name="new1[]" accept="image/*">
<input type="file" name="new2[]" accept="audio/*">
<input type="file" name="new3[]" accept="text/*">

在php中有这些文件的循环

<?php
 $all=array();
 $all[]=array('new1','Dir_for_1st_type_to_store');
 $all[]=array('new2','Dir for 2nd type');
 $all[]=array('new3','Dir for 3rd type');

 for($i=0;$i<count($all);$i++){
   $newFile=$$all[$i][0]; //that is VAR in VAR trick
   echo $newFile; //that's Ok. Temp files with paths displayed
   echo $newFile_name[$i]; //that's not Ok. No output

 ....................//here is a HUUUUUUGE amount of code, written for 'one file variable'
 }
?>

怎么了？

Answer 1

请改为尝试：

HTML：

<input type="file" name="new1[]" accept="image/*" multiple />
<input type="file" name="new2[]" accept="audio/*" multiple />
<input type="file" name="new3[]" accept="text/*" multiple />

PHP：

$map = Array(
    "new1"=>"Dir_for_1st_type_to_store",
    "new2"=>"Dir for 2nd type",
    "new3"=>"Dir for 3rd type",
);
foreach($map as $k=>$v) {
    $fileArray = $_FILES[$k];
    $keys = array_keys($fileArray["name"]);
    foreach($keys as $key) {
        $newFile = array_map(function($a) use ($key) {return $a[$key];},$fileArray);
        var_dump($newFile); // you should see temp filename and other file info
        var_dump($v); // this should be the target folder
        // do stuff with it
    }
}

Answer 2

PHP有一种组织$_FILES数组的愚蠢方式。这个HTML表单：

<input type="file" name="new1[]" accept="image/*">
<input type="file" name="new1[]" accept="image/*">

<input type="file" name="new2[]" accept="audio/*">
<input type="file" name="new2[]" accept="audio/*">

<input type="file" name="new3[]" accept="text/*">
<input type="file" name="new3[]" accept="text/*">

生成类似于：

的数组

// 1st new1 file
$_FILES["new1"]["name"    ][0]
$_FILES["new1"]["type"    ][0]
$_FILES["new1"]["size"    ][0]
$_FILES["new1"]["tmp_name"][0]
$_FILES["new1"]["error"   ][0]
// 2nd new1 file
$_FILES["new1"]["name"    ][1]
$_FILES["new1"]["type"    ][1]
$_FILES["new1"]["size"    ][1]
$_FILES["new1"]["tmp_name"][1]
$_FILES["new1"]["error"   ][1]
// likewise for 1st new2, 2nd new2, 1st new3, 2nd new3

您的代码可以写成：

$all = array();
$all["new1"] = array("Dir for 1st type");
$all["new2"] = array("Dir for 2nd type");
$all["new3"] = array("Dir for 3rd type");

foreach ($all as $key => $conf) {
    for ($i = 0; $i < count($_FILES[$key]["name"]); $i++) {
        if ($_FILES[$key]["error"][$i] === 0) {
            echo $_FILES[$key]["tmp_name"][$i] . " goes to " . $conf[0] . "\n";
            // HUUUUUUGE amount of code goes here
        }
    }
}

**这只是我的意见。

如何为上传的文件使用“变量变量”？

2 个答案: