Simple example of uploading and deleting images in php

/**
php upload pictures
link: http://bbs.it-home.org
*/
if (!empty($_FILES["img"]["name"])) { //Extract the file domain content name and judge
 $path="uppic/"; //Upload path
if(!file_exists($path))
{
//Check whether the folder exists, if not, create it and give it the highest permissions
mkdir("$path" , 0700);
}//END IF
//File formats allowed to be uploaded
$tp = array("image/gif","image/pjpeg","image/jpeg");
//Check whether the uploaded file is In the types that are allowed to be uploaded
if(!in_array($_FILES["img"]["type"],$tp))
{
echo “<script>alert('Incorrect format');history.go(- 1);</script>”;
exit;
}//END IF
$filetype = $_FILES['img']['type'];
if($filetype == 'image/jpeg'){
$type = '.jpg';
}
if ($filetype == 'image/jpg') {
$type = '.jpg';
}
if ($filetype == 'image/pjpeg') {
$type = '.jpg';
}
if($filetype == 'image/gif'){
$type = '.gif';
}
if($_FILES["img"]["name" ])
{
$today=date(“YmdHis”); //Get the time and assign it to the variable
$file2 = $path.$today.$type; //The full path of the image
$img = $today.$ type; //Picture name
$flag=1;
}//END IF
if($flag) $result=move_uploaded_file($_FILES["img"]["tmp_name"],$file2);
//Special Note that the first parameter passed to move_uploaded_file here is the temporary file uploaded to the server
}//END IF
//Then write the value of $img to the corresponding field in the database
?>

2. Delete pictures:

$img = //Query the database to find the corresponding data value
unlink("uppic/".$img); //Delete the file
?>