PHP File Upload Restrictions - php

Question

I want to put a restriction on the size of images uploaded.
Below I have condition for image size.
if ($_FILES["upload_attachment"]["size"] < 25000)) // Max File Size: 25KB
{
echo "File size exceeds maximum.";
}
I want insert condition in this code.
if ( $_FILES ) {
$files = $_FILES['upload_attachment'];
foreach ($files['name'] as $key => $value) {
if ($files['name'][$key]) {
$file = array(
'name' => $files['name'][$key],
'type' => $files['type'][$key],
'tmp_name' => $files['tmp_name'][$key],
'error' => $files['error'][$key],
'size' => $files['size'][$key]
);
$_FILES = array("upload_attachment" => $file);
foreach ($_FILES as $file => $array) {
$newupload = insert_attachment($file,$post->ID);
}
}
}
}

Answer 1

Basically, you want to check that early, before you proceed with file processing, so you're not making the server do any work if it doesn't have to.
Also, FYI, the upload size is specified in bytes, so if you want 25KB, it will be (25 * 1024) = 25600 bytes.
To incorporate that condition, you could do this. It gets a little gnarly, so I've added comments on the closing brackets to note which closes what. fe = foreach
if ( $_FILES ) {//if files exist
if ($_FILES["upload_attachment"]["size"] < 25600) { // Max File Size: 25KB
//I would also recommend adding error handling early.
if ($_FILES['filename']['error'] > 0){
echo 'Error: ' . $_FILES['filename']['error'] . '<br />';
} else {
$files = $_FILES['upload_attachment'];
foreach ($files['name'] as $key => $value) {
if ($files['name'][$key]) {
$file = array(
'name' => $files['name'][$key],
'type' => $files['type'][$key],
'tmp_name' => $files['tmp_name'][$key],
'error' => $files['error'][$key],
'size' => $files['size'][$key]
);
$_FILES = array("upload_attachment" => $file);
foreach ($_FILES as $file => $array) {
$newupload = insert_attachment($file,$post->ID);
}//fe
}//if
}//fe
}//if no errors (else)
} //if size ok
else {
echo "File size exceeds maximum.";
}
}//if $_FILES