PHP Upload Failing - php

Question

Whenever I am uploading any file it says,
File is an image - image/png.Sorry, there was an error uploading your file.
I am using post method and enctype="multipart/form-data". My image file is also proper.
<?php
if(isset($_POST['submit'])){
$target_dir = "pics/";
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
$uploadOk = 1;
$imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);
// Check if image file is a actual image or fake image
if(isset($_POST["submit"])) {
$check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
if($check !== false) {
echo "File is an image - " . $check["mime"] . ".";
$uploadOk = 1;
} else {
echo "File is not an image.";
$uploadOk = 0;
}
}
// Check if file already exists
if (file_exists($target_file)) {
echo "Sorry, file already exists.";
$uploadOk = 0;
}
// Check file size
if ($_FILES["fileToUpload"]["size"] > 500000) {
echo "Sorry, your file is too large.";
$uploadOk = 0;
}
// Allow certain file formats
if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
&& $imageFileType != "gif" ) {
echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";
$uploadOk = 0;
}
// Check if $uploadOk is set to 0 by an error
if ($uploadOk == 0) {
echo "Sorry, your file was not uploaded.";
// if everything is ok, try to upload file
} else {
if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
} else {
echo "Sorry, there was an error uploading your file.";
}
}
}
?>
<form action="" method="post" enctype="multipart/form-data">
<div class="row">
<div class="col-md-6">
<div class="form-group">
<label for="usr">Select image to upload:</label>
<input type="file" name="fileToUpload" id="fileToUpload">
</div>
<div class="form-group">
<label for="usr">URL:</label>
<input type="text" class="form-control" id="usr" name="url">
</div>
</div>
</div>
<button type="submit" name="submit" class="btn btn-success">Add</button>
<button type="reset" class="btn btn-warning">Reset</button>
</form>

Answer 1

Your file cannot be moved.
Check the path to move to
Check the permissions of the directory
Check your access to the tmp directory
You use a relative path: $target_dir = "pics/";
Change your path to:
$target_dir = $_SERVER['DOCUMENT_ROOT'] . '/pics/';