What is the purpose of the trim() function in PHP and how can it be used in this context?

The trim() function in PHP is used to remove any whitespace or other predefined characters from the beginning and end of a string. This can be helpful when dealing with user input or data that may have extra spaces that need to be removed before processing. To use the trim() function, simply pass the string as an argument and it will return the trimmed version of the string.

// Example of using trim() function to remove whitespace from a string
$string = "   Hello, World!   ";
$trimmed_string = trim($string);
echo $trimmed_string; // Output: "Hello, World!"