- var_dump: documentation ( source)
- trim: documentation ( source)
- strtoupper: documentation ( source)
- strrev: documentation ( source)
<?php
function foo($s)
{
return strrev(strtoupper(trim($s)));
}
function bar($s)
{
$s = trim($s);
$s = strtoupper($s);
$s = strrev($s);
return $s;
}
$x = " Hello! ";
var_dump(foo($x));
var_dump(bar($x));