What is the significance of the substr() function in the modified PHP script?

The substr() function in PHP is used to extract a specific portion of a string. In the modified PHP script, the substr() function is significant because it is being used to extract a substring from a given string based on the start and length parameters provided. This allows for manipulation and extraction of specific parts of the string for further processing.

// Original code snippet
$string = "Hello, World!";
$substring = substr($string, 0, 5);
echo $substring;

// Output: Hello

// Modified code snippet with substr() function
$string = "Hello, World!";
$substring = substr($string, 7);
echo $substring;

// Output: World!