What are some functions or methods in PHP that can be used to compare strings regardless of case sensitivity?

When comparing strings in PHP, it is important to consider case sensitivity. To compare strings regardless of case sensitivity, you can use functions like `strcasecmp()` or `strtolower()` to convert both strings to lowercase before comparing them. This ensures that the comparison is done without considering the case of the characters. 

$string1 = "Hello";
$string2 = "hello";

// Using strcasecmp() function
if (strcasecmp($string1, $string2) == 0) {
    echo "The strings are equal.";
} else {
    echo "The strings are not equal.";
}

// Using strtolower() function
if (strtolower($string1) == strtolower($string2)) {
    echo "The strings are equal.";
} else {
    echo "The strings are not equal.";
}

Keywords

strcasecmp strcasecmp strcasecmp() strcmp strcmp()

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