How can PHP developers effectively troubleshoot issues related to string manipulation?

When troubleshooting string manipulation issues in PHP, developers can use functions like `strlen()`, `substr()`, `strpos()`, and `str_replace()` to check the length of strings, extract substrings, find the position of a substring, and replace parts of a string, respectively. By using these functions in combination with debugging tools like `var_dump()` or `echo`, developers can effectively identify and resolve any issues related to string manipulation.

// Example: Troubleshooting string manipulation issues
$string = "Hello, World!";
$substring = substr($string, 0, 5); // Extract the first 5 characters
$position = strpos($string, ","); // Find the position of the comma
$newString = str_replace("World", "PHP", $string); // Replace "World" with "PHP"

var_dump($substring);
var_dump($position);
var_dump($newString);