Loop through variables with common name

Question

At first glance I think you can get what I\'m trying to do. I want to loop though variables with the same name but with a numerical prefix. I also had some confusion about t

Answer 1

You can use variable variables as:

for ( $counter = 1; $counter <= 10; $counter += 1) {
        echo ${'hello' . $counter } , '<br>';
}

Answer 2

as I guess u not even need to declare $hello1 = "hello1". coz the $counter is incrementing the numbers by its loop.

<?php 
for ( $counter = 1; $counter <= 10; $counter += 1) {
echo 'hello' . $counter . "\n";
}
?>

so this is enough to get the output as you want.

the output will be:-

hello1
hello2
hello3
hello4
hello5
hello6
hello7
etc...

Answer 3

It's generally frowned upon, since it makes code much harder to read and follow, but you can actually use one variable's value as another variable's name:

$foo = "bar";
$baz = "foo";

echo $$baz; // will print "bar"

$foofoo = "qux";
echo ${$baz . 'foo'}; // will print "qux"

For more info, see the PHP documentation on variable Variables.

However, as I already mentioned, this can lead to some very difficult-to-read code. Are you sure that you couldn't just use an array instead?

$hello = array(
    "hello1",
    "hello2",
    // ... etc
);

foreach($hello as $item) {
    echo $item . "<br>";
}

Answer 4

Try ${"hello" . $counter}

$a = "hell";
$b = "o";
$hello = "world";
echo ${$a . $b};

// output: world