PHP · Theory

What is PHP

Theory

4/352

What is PHP

What is PHP? Hypertext Preprocessor — a server language mixed into HTML. You can write HTML, then a PHP block that prints the student’s name, then more HTML. The visitor never has to know PHP ran.

Open source, huge hosting support, talks easily to MySQL. That is why so many college projects still use it. Modern PHP (8+) has types, attributes, and JIT — it is not ‘only 2005 echo pages’.

Trap — ‘PHP is dead’. Say where it is used (WordPress, Laravel) and that you write PHP 8, not PHP 4.

Exam tip

Server language inside HTML. Browser sees output only.

Example

<?php
// What is 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";
}

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

Short notes

DefServer language, often inside HTML.
RuleBrowser sees the output, not the PHP source.
TrapCalling it outdated instead of naming PHP 8 / Laravel.

PHP · Theory

What is PHP

← All stacks

Theory

4/352

What is PHP

Open source, huge hosting support, talks easily to MySQL. That is why so many college projects still use it. Modern PHP (8+) has types, attributes, and JIT — it is not ‘only 2005 echo pages’.

Trap — ‘PHP is dead’. Say where it is used (WordPress, Laravel) and that you write PHP 8, not PHP 4.

Exam tip

Server language inside HTML. Browser sees output only.

Example

<?php
// What is 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";
}

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

Short notes

DefServer language, often inside HTML.
RuleBrowser sees the output, not the PHP source.
TrapCalling it outdated instead of naming PHP 8 / Laravel.

What is PHP

Example

Short notes

Questions

What is PHP

Example

Short notes

Questions