Pass variable from PHP to Powershell script

I am trying to pass a variable from PHP to a powershell script.

My PHP code is :

shell_exec("powershell.exe -ExecutionPolicy Bypass -NoProfile -InputFormat none -file test.ps1 '$txt' < NUL ");

And I am trying to capture it in powershell using :

param (
  [string]$txt
)

Add-Content "test.txt" $txt

The $txt is a string variable as I can write it in a txt file from PHP. I do not know exactly where I am wrong as the powershell is executed.

Answer

Use the following:

shell_exec("powershell.exe -ExecutionPolicy Bypass -NoProfile -file test.ps1 "$txt"");

^{Note: If the value of $txt had embedded " chars., they’d need to be escaped.}

• The PowerShell CLI doesn’t recognize '...' quoting when passing arguments to a script file executed via -File; use "...".

  • Your attempt with '$txt' shouldn’t have resulted in an empty file, but it would have included the ' chars. as part of the argument; if $txt happens to contain spaces, each space-separated word would have become a separate argument, with the first starting with ' and the last ending in '

• Since you’re not providing input via stdin, there is no need for -inputFormat and < NUL