Make php array case in-sensitive [duplicate]

Question

This question already has answers here:

Case-insensitive array search (3 answers)

Closed 8 years ago.

if someone searches "TestING" it should still read as "testing". I have a php file included into my webpages search to block certain terms. but i have to add each case in for every word. is there a quick fix so the case does not matter?

<?

$blocked=array('nude','nsfw','xrated');

?>

Answer 1

Since you're using strstr, you can replace it with stristr, which is the case insensitive version

if(stristr($_GET[q],$term)==false)

Answer 2

Another way of doing things instead of always checking with strtolower is instead of in_array, use this function.

function in_arrayi($needle, $haystack) {
    return in_array(strtolower($needle), array_map('strtolower', $haystack));
}

See http://us2.php.net/manual/en/function.in-array.php#89256

Answer 3

You can make everyting lowercase using strtolower.

$var1 = "Hello";
$var2 = "hello";
if (strtolower($var1) == strtolower($var2)) {
    echo '$var1 is equal to $var2 in a case-insensitive string comparison';
}

Or you can use strcasecmp.

$var1 = "Hello";
$var2 = "hello";
if (strcasecmp($var1, $var2) == 0) {
    echo '$var1 is equal to $var2 in a case-insensitive string comparison';
}