How can PHP developers ensure optimal performance when using string manipulation functions like explode() and preg_split()?

When using string manipulation functions like explode() and preg_split() in PHP, developers can ensure optimal performance by limiting the number of elements being split and using the appropriate function for the task at hand. Additionally, developers should consider the complexity of the regular expression patterns used in preg_split() to avoid performance bottlenecks.

// Example of using explode() with a limited number of elements
$string = "apple,banana,cherry,date";
$fruits = explode(",", $string, 2); // Limiting the split to 2 elements

// Example of using preg_split() with a simple regular expression pattern
$string = "apple,banana,cherry,date";
$fruits = preg_split("/,/", $string);