How to use a PHP switch statement to check if a string contains a word (but can also contain others)?

Based on this question and this answer, the solutions I've come up with (while still using a case select) are below.

You can use either stristr() or strstr(). The reason I chose to use stristr() in this case is simply because it's case-insensitive, and thus, is more robust.

Example:

$linkKW = $_GET['kw'];switch (true){   case stristr($linkKW,'berlingo'):      include 'berlingo.php';      break;   case stristr($linkKW,'c4'):      include 'c4.php';      break;}

You could also use stripos() or strpos() if you'd like (thanks, Fractaliste), though I personally find this more difficult to read. Same deal as the other method above; I went the case-insensitive route.

Example:

$linkKW = $_GET['kw'];switch (true){   case stripos($linkKW,'berlingo') !== false:      include 'berlingo.php';      break;   case stripos($linkKW,'c4') !== false:      include 'c4.php';      break;}

Since in a switch statement only a simple equality testing will be performed it won't help you much here. You need to run the string through a string matching function, best suited of which is strpos. The straight forward answer is:

if (strpos($_GET['kw'], 'berlingo') !== false) {    include 'berlingo.php';} else if (strpos($_GET['kw'], 'c4') !== false) {    include 'c4.php';} … and so on …

The more elegant solution would be something like this:

$map = array('berlingo' => 'berlingo.php', 'c4' => 'c4.php', …);foreach ($map as $keyword => $file) {    if (strpos($_GET['kw'], $keyword) !== false) {        include $file;        break;    }}

Or, if the correspondence between the keyword and the file is always 1:1:

$keywords = array('berlingo', 'c4', …);foreach ($keywords as $keyword) {    if (strpos($_GET['kw'], $keyword) !== false) {        include "$keyword.php";        break;    }}

You can use strpos function as:

if(strpos($_GET['kw'],'berlingo') !== false) { include 'berlingo.php';}if(strpos($_GET['kw'],'c4') !== false) { include 'c4.php';}