In PHP, you can make all strings in an array of strings uppercase by calling the strtoupper()
function on every element of the array using array_map()
, for example, like so:
// PHP 7.4+ $arr = ['foo', 'Bar', 'bAz']; $newArr = array_map(fn ($str) => strtoupper($str), $arr); var_dump($newArr); // ['FOO', 'BAR', 'BAZ']
You can rewrite the callback to array_map()
without arrow function to make it compatible with earlier versions of PHP.
The code above would create a new array with all strings in the array in uppercase. You can achieve the same with a simple for
loop as well:
$arr = ['foo', 'Bar', 'bAz']; $newArr = []; foreach ($arr as $str) { $newArr[] = strtoupper($str); } var_dump($newArr); // ['FOO', 'BAR', 'BAZ']
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