What debugging techniques can be used to identify and resolve issues related to the handling of spaces in PHP scripts?

When handling spaces in PHP scripts, one common issue is unintentional spaces being included in strings or variables, leading to unexpected behavior or errors. To identify and resolve these issues, you can use debugging techniques such as printing out the values of variables to check for extra spaces, using trim() function to remove leading and trailing spaces, and using regular expressions to replace multiple spaces with a single space.

// Example of using trim() function to remove leading and trailing spaces
$myString = "  Hello World  ";
$trimmedString = trim($myString);
echo $trimmedString; // Output: "Hello World"