PHP代码mkdir（）不工作，没有错误

Question

pls i need help am trying to use the mkdir for user profile pic upload and its not working ... but when i use it normally i.e ordinarilly for example when i created a new php page and used " mkdir("newdir") "it worked

    <?php
if (isset($_FILES['profilepic'])) {

   if (((@$_FILES["profilepic"]["type"]=="image/jpeg") || 
 (@$_FILES["profilepic"]["type"]=="image/png") || (@$_FILES["profilepic"]
["type"]=="image/gif"))&&(@$_FILES["profilepic"]["size"] < 1048576)) { 
//1 Megabyte 
   $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
$rand_dir_name = substr(str_shuffle($chars), 0, 15);
mkdir("userdata/profile_pics/$rand_dir_name");
}
else{

}

}
?>

<p>UPLOAD YOUR PROFILE PHOTO:</p> <br />

<form action="" method="POST" enctype="multipart/formdata">

<img src="./img/default_pic.png" width="70" />

<input type="file" name="profilepic" /><br /><br />

<input type="submit" name="uploadpic" value="Upload Photo"><br />

</form>

Answer 1

its not because of php, the php code is written well the problem is in the html where the html form enctype is written wrong

this

<form action="" method="POST" enctype="multipart/formdata">

should be

<form action="" method="POST" enctype="multipart/form-data">