Executing PowerShell Script from Server Using PHP - php

Question

I have a PowerShell script hosted on a server. I am calling PowerShell script from Php as below:
<?php
header('Content-Type: text/plain');
$csv = file_get_contents('http://domaincom/wp-content/uploads/csv-samples.csv');
echo $csv;
shell_exec('pwsh -File http://domaincom/wp-content/uploads/pscript.ps1');
$psPath = "powershell.exe";
$psDIR = "http://domaincom/wp-content/uploads/";
$psScript = "pscript.ps1";
$runScript = $psDIR. $psScript;
$runCMD = $psPath." ".$runScript." 2>&1";
echo "\$psPath $psPath <br>";
echo "\$psDIR $psDIR <br>";
echo "\$psScript $psScript <br>";
echo "\$runScript $runScript <br>";
echo "\$runCMD $runCMD <br>";
exec( $runCMD,$out,$ret);
echo "<pre>";
print_r($out);
print_r($ret);
echo "</pre>";
?>
Script executes and I can see csv-samples.csv results in browser, but the powershell script doesn't execute. I get below message in browser:
Site,URL,Category
Sitepoint,http://www.sitepoint.com/,Web development
Html.it,http://www.html.it/,Web development
Wamboo,http://www.wamboo.it/,Web development$psPath powershell.exe <br>$psDIR http://domaincom/wp-
content/uploads/ <br>$psScript pscript.ps1 <br>$runScript http://domaincom/wp-
content/uploads/pscript.ps1 <br>$runCMD powershell.exe http://domaincom/wp-
content/uploads/pscript.ps1 2>&1 <br><pre>Array
(
[0] => sh: 1: powershell.exe: not found
)
127</pre>
Your help is very much appreciated.
Thank You.