PHP · Theory

Install PHP

Theory

3/352

Install PHP

Install PHP + a server. College: XAMPP (Apache + PHP + MySQL). Check php -v in a new terminal. Put files in htdocs. URL is localhost, not double-clicking the file.

php -S localhost:8000 is the built-in server for practice. Still use Apache/Nginx in real hosting.

Trap — editing files outside htdocs. Trap: port 80 busy so XAMPP Apache won’t start — use 8080.

Exam tip

XAMPP or php -S. php -v. localhost, not file://.

Example

<?php
// Install PHP
$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";
}

Install PHP: scores array, print avg, then high marks. Say the output.

Short notes

DefPHP + Apache (XAMPP) or php -S.
Rulephp -v. Open via localhost.
Trapfile:// and wrong folder.

PHP · Theory

Install PHP

← All stacks

Theory

3/352

Install PHP

Install PHP + a server. College: XAMPP (Apache + PHP + MySQL). Check php -v in a new terminal. Put files in htdocs. URL is localhost, not double-clicking the file.

php -S localhost:8000 is the built-in server for practice. Still use Apache/Nginx in real hosting.

Trap — editing files outside htdocs. Trap: port 80 busy so XAMPP Apache won’t start — use 8080.

Exam tip

XAMPP or php -S. php -v. localhost, not file://.

Example

<?php
// Install PHP
$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";
}

Install PHP: scores array, print avg, then high marks. Say the output.

Short notes

DefPHP + Apache (XAMPP) or php -S.
Rulephp -v. Open via localhost.
Trapfile:// and wrong folder.

Install PHP

Example

Short notes

Questions

Install PHP

Example

Short notes

Questions