- var_dump: documentation ( source)
- strtoupper: documentation ( source)
<?php
$names = [ ["Rasmus","Lerdorf"],
["Andi","Gutmans"],
["Zeev","Suraski"] ];
foreach ($names as list($fname,)) {
$fname = strtoupper($fname);
echo $fname, "<br>\n";
}
var_dump($names);