How can one ensure that the correct syntax is used when specifying the number of occurrences to replace in a PHP preg_replace function?

When specifying the number of occurrences to replace in a PHP preg_replace function, it's important to use the correct syntax to avoid errors. The syntax for specifying the number of replacements is to include it as the fourth parameter in the preg_replace function. This number should be an integer greater than or equal to zero. If you want to replace all occurrences, you can use -1 as the value.

// Example of using preg_replace with the correct syntax for specifying the number of occurrences
$string = "Hello, world! Hello, universe!";
$pattern = "/Hello/";
$replacement = "Hi";
$limit = 1; // Replace only the first occurrence

$result = preg_replace($pattern, $replacement, $string, $limit);
echo $result;