PHP · Theory

File Upload

Theory

51/352

File Upload

File Upload is a PHP topic. In plain words you use it for photo.jpg upload in profile page. Don’t start with a slogan — start with that picture.

Smallest example: move_uploaded_file after validation. Type it, run it, and say what you see. If you can do that from memory, you know File Upload.

From the example next to this theory — File Upload: scores array, print avg, then high marks.

Trap — no size / type check. Fix that before you talk about advanced PHP.

Viva — what is File Upload? Then show move_uploaded_file after validation. Then name the trap.

Exam tip

What is File Upload? Show this: move_uploaded_file after validation. Trap: no size / type check.

Example

<?php
// File Upload
$scores = [80, 90, 70];
$avg = array_sum($scores) / count($scores);
echo "avg=" . number_format($avg, 1) . "\n";
foreach ($scores as $s) {
  if ($s >= 80) echo "high: $s\n";
}

File Upload: scores array, print avg, then high marks. Say the output.

Short notes

DefFile Upload — photo.jpg upload in profile page.
Rulemove_uploaded_file after validation
Trapno size / type check
Useprofile page

PHP · Theory

File Upload

← All stacks

Theory

51/352

File Upload

File Upload is a PHP topic. In plain words you use it for photo.jpg upload in profile page. Don’t start with a slogan — start with that picture.

Smallest example: move_uploaded_file after validation. Type it, run it, and say what you see. If you can do that from memory, you know File Upload.

From the example next to this theory — File Upload: scores array, print avg, then high marks.

Trap — no size / type check. Fix that before you talk about advanced PHP.

Viva — what is File Upload? Then show move_uploaded_file after validation. Then name the trap.

Exam tip

What is File Upload? Show this: move_uploaded_file after validation. Trap: no size / type check.

Example

<?php
// File Upload
$scores = [80, 90, 70];
$avg = array_sum($scores) / count($scores);
echo "avg=" . number_format($avg, 1) . "\n";
foreach ($scores as $s) {
  if ($s >= 80) echo "high: $s\n";
}

File Upload: scores array, print avg, then high marks. Say the output.

Short notes

DefFile Upload — photo.jpg upload in profile page.
Rulemove_uploaded_file after validation
Trapno size / type check
Useprofile page

File Upload

Example

Short notes

Questions

File Upload

Example

Short notes

Questions