Compress File per file, same name - powershell

Question

I hope you are all safe in this time of COVID-19.
I'm trying to generate a script that goes to the directory and compresses each file to .zip with the same name as the file, for example:
sample.txt -> sample.zip
sample2.txt -> sample2.zip
but I'm having difficulties, I'm not that used to powershell, I'm learning and improving this script. In the end it will be a script that deletes files older than X days, compresses files and makes them upload in ftp .. the part of excluding with more than X I've already managed it for days, now I grabbed a little bit on this one.
Last try at moment.
param
(
#Future accept input
[string] $InputFolder,
[string] $OutputFolder
)
#test folder
$InputFolder= "C:\Temp\teste"
$OutputFolder="C:\Temp\teste"
$Name2 = Get-ChildItem $InputFolder -Filter '*.csv'| select Name
Set-Variable SET_SIZE -option Constant -value 1
$i = 0
$zipSet = 0
Get-ChildItem $InputFolder | ForEach-Object {
$zipSetName = ($Name2[1]) + ".zip "
Compress-Archive -Path $_.FullName -DestinationPath "$OutputFolder\$zipSetName"
$i++;
$Name2++
if ($i -eq $SET_SIZE) {
$i = 0;
$zipSet++;
}
}

Answer 1

You can simplify things a bit, and it looks like most of the issues are because in your script example $Name2 will contain a different set of items than the Get-ChildItem $InputFolder will return in the loop (i.e. may have other objects other than .csv files).
The best way to deal with things is to use variables with the full file object (i.e. you don't need to use |select name). So I get all the CSV file objects right away and store in the variable $CsvFiles.
We can additionally use the special variable $_ inside the ForEach-Object which represents the current object. We also can use $_.BaseName to give us the name without the extension (assuming that's what you want, otherwise use $_Name to get a zip with the name like xyz.csv).
So a simplified version of the code can be:
$InputFolder= "C:\Temp\teste"
$OutputFolder="C:\Temp\teste"
#Get files to process
$CsvFiles = Get-ChildItem $InputFolder -Filter '*.csv'
#loop through all files to zip
$CsvFiles | ForEach-Object {
$zipSetName = $_.BaseName + ".zip"
Compress-Archive -Path $_.FullName -DestinationPath "$OutputFolder\$zipSetName"
}