blocks|key|840316|text|问题是你的状况：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|840317|如果if+x+or+y或y之一为真，则计算为真。在您的示例中，jpg肯定不等于png，为什么它总是计算为true。|offset|length|style|CODE|840318|如何评估它：|840319|if(("image/jpeg"+!=+"image/gif")+%7C%7C+("image/jpeg"+!=+"image/jpeg")+%7C%7C+("image/jpeg"+!=+"image/png"))|code-block|syntax|javascript|840320|这意味着：|840321|if(true+%7C%7C+false+%7C%7C+true)|840322|即：|840323|if(true)|840324|相反，将其改为：|840325|if+(!($uploadFile_type+==+"image/gif"+%7C%7C+$uploadFile_type+==+"image/jpeg"+%7C%7C+$uploadfile_type+==+"image/png"))|840326|entityMap^0|0|2|9|C|1|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|13|8|@$D|14|E|15|F|G]|$D|16|E|17|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|18|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|19|8|@]|9|@]|A|$M|N]]|$1|O|3|P|5|6|7|1A|8|@]|9|@]|A|$]]|$1|Q|3|R|5|L|7|1B|8|@]|9|@]|A|$M|N]]|$1|S|3|T|5|6|7|1C|8|@]|9|@]|A|$]]|$1|U|3|V|5|L|7|1D|8|@]|9|@]|A|$M|N]]|$1|W|3|X|5|6|7|1E|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|L|7|1F|8|@]|9|@]|A|$M|N]]|$1|10|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]]|11|$]]

The problem is your condition:

<code>if x or y</code> is evaluated as true if one of <code>x</code> or <code>y</code> is true. In your example jpg is for sure not equal to png, why it will always evaluate to true.

how it gets evaluated:

<pre><code>if(("image/jpeg" != "image/gif") || ("image/jpeg" != "image/jpeg") || ("image/jpeg" != "image/png"))
</code></pre>

which gives:

<pre><code>if(true || false || true)
</code></pre>

which is:

<pre><code>if(true)
</code></pre>

instead change it to:

<pre><code>if (!($uploadFile_type == "image/gif" || $uploadFile_type == "image/jpeg" || $uploadfile_type == "image/png"))
</code></pre>

blocks|key|875484|text|试试这个..。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|875485|$array+=+array('image/gif','image/jpg','image/png');
if(!in_array($uploadFile_type,$array)){
++++echo+"Sorry,+only+GIF/JPG+or+PNG+files+are+allowed.";
}|code-block|syntax|javascript|875486|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try This..

<pre><code>$array = array('image/gif','image/jpg','image/png');
if(!in_array($uploadFile_type,$array)){
 echo "Sorry, only GIF/JPG or PNG files are allowed.";
}
</code></pre>

blocks|key|875500|text|为什么不创建一个有效值数组，例如，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|875501|$valid_image_types+=+array('image/gif',+'image/jpeg',+'image/png');|code-block|syntax|javascript|875502|然后检查此数组中的文件上载类型。|875503|if+(!in_array($uploadFile_type,+$valid_image_types))+{++
+++++echo+"Sorry,+only+GIF/JPG+or+PNG+files+are+allowed.";
}|875504|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Why not make an array of valid values e.g, 

<pre><code>$valid_image_types = array('image/gif', 'image/jpeg', 'image/png');
</code></pre>

and then check your file upload type in this array.

<pre><code>if (!in_array($uploadFile_type, $valid_image_types)) { 
 echo "Sorry, only GIF/JPG or PNG files are allowed.";
}
</code></pre>

blocks|key|2077145|text|尝尝这个|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2077146|<?php
if(isset($_FILES['image']))
{
++++$errors=+array();
++++$file_name+=+$_FILES['image']['name'];
++++$file_size+=$_FILES['image']['size'];
++++$file_tmp+=$_FILES['image']['tmp_name'];
++++$file_type=$_FILES['image']['type'];+++
++++$value+=+explode(".",+$file_name);
++++$file_ext+=+strtolower(array_pop($value));
++++$expensions=+array("jpeg","jpg","png","gif");+++
++++if(in_array($file_ext,$expensions)==+false)
++++{
+++++++$errors="Extension+not+allowed,+please+choose+a+JPEG+or+PNG+file.";
++++}
++++if($file_size+>+2097152)
++++{
+++++++$errors[]='File+size+must+be+excately+2+MB';
++++}++++
++++if(empty($errors)==true)
++++{
+++++++move_uploaded_file($file_tmp,"upload/".$file_name);
+++++++echo+"Success";
++++}else
++++{
+++++++print_r($errors);
++++}
}
?>|code-block|syntax|javascript|2077147|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try this

<pre><code>&lt;?php
if(isset($_FILES['image']))
{
 $errors= array();
 $file_name = $_FILES['image']['name'];
 $file_size =$_FILES['image']['size'];
 $file_tmp =$_FILES['image']['tmp_name'];
 $file_type=$_FILES['image']['type']; 
 $value = explode(".", $file_name);
 $file_ext = strtolower(array_pop($value));
 $expensions= array("jpeg","jpg","png","gif"); 
 if(in_array($file_ext,$expensions)== false)
 {
 $errors="Extension not allowed, please choose a JPEG or PNG file.";
 }
 if($file_size &gt; 2097152)
 {
 $errors[]='File size must be excately 2 MB';
 } 
 if(empty($errors)==true)
 {
 move_uploaded_file($file_tmp,"upload/".$file_name);
 echo "Success";
 }else
 {
 print_r($errors);
 }
}
?&gt;
</code></pre>

blocks|key|2077169|text|这将只允许文件类型image/png,+image/jpg+and+image/png。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2077170|$uploadFile_type+=+"image/png";

if+($uploadFile_type+!=+"image/gif"+and+$uploadFile_type+!=+"image/jpg"+and+$uploadFile_type+!=+"image/png")+{
+echo+"Sorry,+only+GIF/JPG+or+PNG+files+are+allowed.";
}|code-block|syntax|javascript|2077171|代码中也有一个错误：$uploadfile_type+!=+"image/png")|2077172|它实际上：|2077173|$uploadFile_type+!=+"image/png"|2077174|沙盒|2077175|entityMap|0|LINK|mutability|MUTABLE|url|http://sandbox.onlinephpfunctions.com/code/7df19f280468ff890e9548971f179d384b71095d^0|9|Y|0|0|A|W|0|0|0|0|2|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|13|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|14|8|@$9|15|A|16|B|C]]|D|@]|E|$]]|$1|M|3|N|5|6|7|17|8|@]|D|@]|E|$]]|$1|O|3|P|5|H|7|18|8|@]|D|@]|E|$I|J]]|$1|Q|3|R|5|6|7|19|8|@]|D|@$9|1A|A|1B|1|1C]]|E|$]]|$1|S|3|-4|5|6|7|1D|8|@]|D|@]|E|$]]]|T|$U|$5|V|W|X|E|$Y|Z]]]]

This will only allow file type <code>image/png, image/jpg and image/png</code>

<pre><code>$uploadFile_type = "image/png";

if ($uploadFile_type != "image/gif" and $uploadFile_type != "image/jpg" and $uploadFile_type != "image/png") {
 echo "Sorry, only GIF/JPG or PNG files are allowed.";
}
</code></pre>

A typo also in your code : <code>$uploadfile_type != "image/png")</code>

Its actually:

<pre><code>$uploadFile_type != "image/png"
</code></pre>

<a href="http://sandbox.onlinephpfunctions.com/code/7df19f280468ff890e9548971f179d384b71095d" rel="nofollow">Sandbox</a>

blocks|key|840382|text|我也有同样的问题，我尝试使用这个代码，它现在可以工作了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|840383|+if+($uploadFile_type+!=+"image/gif")+{++
+++++++++++++if($uploadFile_type+!=+"image/jpg")+{
++++++++++++++++if($uploadfile_type+!=+"image/png"){

++++++++++++++++++echo+"Sorry,+only+GIF/JPG+or+PNG+files+are+allowed.";
++++++++++++++++}
+++++++++++++}
++++++++++}|code-block|syntax|javascript|840384|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

i have same issues and i try with this code and it will working now 

<pre><code> if ($uploadFile_type != "image/gif") { 
 if($uploadFile_type != "image/jpg") {
 if($uploadfile_type != "image/png"){

 echo "Sorry, only GIF/JPG or PNG files are allowed.";
 }
 }
 }
</code></pre>

I am having a problem with some code:

This code works:

<pre><code>if (!($uploadFile_type == "image/gif")) {
 echo "Sorry, only GIF files are allowed.";
 $uploadOk = 0;
}
</code></pre>

Now, I want to do multiples so I'm trying this:

<pre><code>if (($uploadFile_type != "image/gif") || ($uploadFile_type != "image/jpg") || ($uploadfile_type != "image/png")) { 
 echo "Sorry, only GIF/JPG or PNG files are allowed.";
}
</code></pre>

The problem is that whenever I upload .jpg files I get "Sorry, only GIF/JPG or PNG files are allowed."

Is there something wrong with the code above?

PHP File Upload (File Type) Filter

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我对一些代码有问题：此代码适用于：if (!($uploadFile_type == "image/gif")) {    echo "Sorry, only GIF files are allowed.";    $uploadOk = 0;}现在，我想做倍数，所以我正在尝试：if (($uploadFile_type != "image/gif") || ($uploadFile_type !

问PHP文件上传(文件类型)过滤器
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