What tools or techniques can be utilized to search for specific strings or variables within a PHP project for debugging or modification purposes?

When debugging or modifying a PHP project, you may need to search for specific strings or variables within the codebase. One common way to do this is by using the `grep` command in the terminal. This command allows you to search for specific patterns within files.

// Use the grep command in the terminal to search for a specific string within PHP files
// For example, to search for the string "example" in all PHP files in a directory, you can use the following command:
// grep -r "example" *.php