Are there any potential pitfalls to be aware of when using str_replace function in PHP?

One potential pitfall when using the str_replace function in PHP is that it is case-sensitive by default. This means that if you are trying to replace a string but the case does not match exactly, the function will not work as expected. To solve this issue, you can use the str_ireplace function instead, which is case-insensitive.

// Using str_ireplace to perform case-insensitive string replacement
$string = "Hello World";
$newString = str_ireplace("hello", "hi", $string);
echo $newString; // Output: hi World