What are some best practices for handling PHP variables within Bash scripts to avoid syntax errors and unexpected behavior?

When handling PHP variables within Bash scripts, it is important to properly escape special characters to avoid syntax errors and unexpected behavior. One way to do this is by using double quotes around PHP variables in Bash commands to ensure that they are interpreted correctly. Example: ```bash #!/bin/bash # Define a PHP variable php_var="Hello, World!" # Use double quotes around the PHP variable to ensure proper interpretation output=$(php -r "echo \"$php_var\";") echo $output ```