<?php
// \n - перевод строки
$number = 7;
$array_numbers = [1, 2, 3, 5, 8, 10];
$array_string = ['asd', 'cvb', 'qwe', 'xcv', 'number'];
 
echo "Переменная number до цикла $number \n";
for($i = 0; $i < 5; $i++) {
	// просто работаю с переменной, она в одной области видимости
	// php.net/manual/ru/language.variables.scope.php
	$number++;
}
echo "Переменная number после цикла $number \n";
 
echo "----------------------------------------- \n";
echo "Элементы массива\n";
for($i = 0; $i < 5; $i++) {
	// с элементами массива можно работать так
	$array_numbers[$i] += 5;
	echo $array_numbers[$i];
	echo "\n";
}
 
echo "----------------------------------------- \n";
echo "Элементы массива\n";
for($i = 0; $i < 5; $i++) {
	$array_string[$i] .= $i
;
	echo $array_string[$i];
	echo "\n";
}
 
echo "----------------------------------------- \n";
echo "Foreach\n";
// а можно и так, даже будет правильней
foreach($array_numbers as $item) {
	echo $item . "\n";
}
 
echo "----------------------------------------- \n";
echo "Foreach с индексом\n";
// можно добавить индекс
foreach($array_string as $index => $item) {
	echo "{$index} элемент это - {$item}" . "\n";
}

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