程式小測驗!!

# Don't Use Any Loop Condition
write a reverse printing string program using recursion
$arr_x = array(
"a",
"b",
"c",
"d"
);

search the max number in an array
$arr_x = array(
"23424",
"123",
"7348",
"89237",
"3563",
"3599"
);

sort the array
$arr_x = array(
"23424",
"123",
"7348",
"89237",
"3563",
"3599"
);

print the array one char at a time repetitively forever without using an if statement.
# Do not use IF Statement
$arr_x = array(
"a",
"b",
"c",
"d",
"e",
"f",
"g",
"h",
"i",
"j",
"k",
"l"
);