String Checking in PHP

str_starts_withstr_ends_withstr_contains

Задание 1

Given a string:

php<?php
  $str = 'document.pdf';
?>

Check if the string ends with '.pdf'.

Задание 2

Given a string:

php<?php
  $str = 'https://example.com';
?>

Check if the string starts with 'https://'.

Задание 3

Given a string:

php<?php
  $str = 'The quick brown fox';
?>

Check if the string contains the substring 'fox'.

Задание 4

Given a string:

php<?php
  $str = 'image.png';
?>

Check if the string ends with '.png' or '.jpg'.

Задание 5

Given a string:

php<?php
  $str = 'admin@example.com';
?>

Check if the string contains the character '@' and ends with '.com'.