Let say I have an array coming in a $_POST called users
Then I run the following callback real_escape_string. But lets say I have a couple more functions I would like to run as well like clean and trim. Is it possible to do this in one line?
$users = array_map(array($GLOBALS['conn'], 'real_escape_string'), $_POST['users']);
Please review the corresponding section of the PHP documentation for array_map(). Note that the function accepts one callback function and any number of arrays following it, making it impossible to place multiple callbacks into a single array_map() call. If you want to apply multiple functions, you will need to either use nested array_map() calls or pass an anonymous function. Example:
// Nesting.
array_map('trim', array_map('strtoupper', array(' input1 ', ' Input2')));
// Anonymous function.
array_map(function($elem) {
return trim(strtoupper($elem));
}, array(' input1 ', ' Input2'));
You could also iterate over a list of callbacks like this:
$my_callbacks = array('trim', 'strtoupper');
array_map(function($elem) use ($my_callbacks) {
foreach($my_callbacks as $callback) {
$elem = $callback($elem);
}
return $elem;
}, array(' input1 ', ' Input2'));
There are plenty of ways to approach this problem. You'll need to select the one that best suits your use case.
