What are the potential pitfalls of using str_replace in PHP when searching for specific patterns within a string?

One potential pitfall of using str_replace in PHP when searching for specific patterns within a string is that it is case-sensitive by default. This means that if you are looking for a specific pattern but the case does not match exactly, the replacement will not occur. To solve this issue, you can use the str_ireplace function instead, which is case-insensitive.

// Example code snippet using str_ireplace to perform case-insensitive pattern matching
$string = "Hello World";
$pattern = "world";
$replacement = "PHP";

$new_string = str_ireplace($pattern, $replacement, $string);
echo $new_string; // Output: Hello PHP