Hello all back some days I was facing issue in executing PHP code in AWS Cloud9 now the respective code is producing output as for the arguments passed as guided here https://docs.aws.amazon.com/…/l…/user-guide/sample-php.html… using filename.php 10 25 but getting some error kindly guide code <?php print("Hello, World!"); print("\nThe sum of 2 and 3 is 5."); $sum = (int)$argv + (int)$argv; print("\nThe sum of $argv and $argv is $sum."); ?> output Running PHP script /home/ubuntu/dev-ide/test1.php (standard_in) 1: syntax error bash: line 9: [: -eq: unary operator expected Hello, World! The sum of 2 and 3 is 5. The sum of 10 and 25 is 35.