Finding Errors in PHP Loop Code

In the following tasks, a programmer wrote some code and possibly made mistakes in it. You must check if the code does what is described. If the code works incorrectly, you must fix the errors.

Задание 1

The code should output numbers from 0 to 10:

php<?php
  for ($i = 0; $i > 10; $i++) {
    echo $i;
  }
?>

Задание 2

The code should output numbers from 10 to 0:

php<?php
  for ($i = 10; $i > 0; $i++) {
    echo $i;
  }
?>

Задание 3

The code should output numbers from 10 to 0:

php<?php
  for ($i = 10; $i == 0; $i--) {
    echo $i;
  }
?>

Задание 4

The code should output numbers from 0 to 10:

php<?php
  $i = 0;
  
  while ($i >= 10) {
    echo $i;
    $i++;
  }
?>

Задание 5

The code should find the sum of integers from 1 to 10:

php<?php
  $res;
  
  for ($i = 1; $i <= 10; $i++) {
    res += $i;
  }
  
  echo $res;
?>

Задание 6

The code should find the product of integers from 1 to 10:

php<?php
  $res = 0;
  
  for ($i = 1; $i <= 10; $i++) {
    $res *= $i;
  }
  
  echo $res;
?>

Задание 7

The code should square each element of the array:

php<?php
  $arr = [1, 2, 3, 4, 5];
  
  foreach ($arr as $elem) {
    $elem = $elem ** 2;
  }
  
  var_dump($arr);
?>

Задание 8

The code should fill the array with numbers from 1 to 5:

php<?php
  $arr = 0;
  
  for ($i = 1; $i <= 5; $i++) {
    $arr[] = $i;
  }
  
  var_dump($arr);
?>

Задание 9

The code should check if the array contains the number 3 or not:

php<?php
  $arr = [1, 2, 3, 4, 5];
  $res = '';
  
  foreach ($arr as $elem) {
    if ($elem === 3) {
      $res = '+++';
    } else {
      $res = '---';
    }
  }
  
  echo $res;
?>

Задание 10

The code should output numbers from 10 to 1:

php<?php
  $i = 10;
  
  while ($i == 10) {
    echo $i;
    $i--;
  }
?>

Задание 11

The code should check if the array contains the number 3 or not:

php<?php
  $arr = [1, 2, 3, 4, 5];
  $res = false;
  
  foreach ($arr as $elem) {
    if ($elem === 3) {
      $res = true;
      break;
    }
  }
  
  var_dump($res);
?>

Задание 12

The code should output numbers from 10 to 1:

php<?php
  $i = 10;
  
  while ($i <= 0) {
    echo $i;
    $i--;
  }
?>

Задание 13

The code should output only even elements from the array:

php<?php
  $arr = [1, 2, 3, 4, 5];
  
  foreach ($arr as $elem) {
    if ($elem % 2 = 0) {
      echo $elem;
    }
  }
?>

Задание 14

The code should output numbers from 10 to 1:

php<?php
  $i = 10;
  
  while ($i >= 1) {
    echo $i;
  }
?>

Задание 15

The code should output numbers from 10 to 1:

php<?php
  $i = 10;
  
  while ($i >= 1) {
    echo $i;
    $i++;
  }
?>