What is the difference between strpos and stripos in PHP?

The main difference between strpos and stripos in PHP is that strpos is case-sensitive, meaning it will only find the exact substring you specify, while stripos is case-insensitive, so it will find the substring regardless of case. If you need to search for a substring without considering case, you should use stripos. 

// Using stripos to find a substring case-insensitively
$haystack = 'Hello World';
$needle = 'world';
if (stripos($haystack, $needle) !== false) {
    echo 'Substring found!';
} else {
    echo 'Substring not found.';
}

Keywords

strpos stripos PHP string functions case-insensitive.

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