Josh Sherman
Reversing a string in most languages is a pretty trivial task. In PHP we have a
dedicated strrev function to do so:
$string = 'This is my awesome string!';
$reverse = strrev($string);
But what if this function didn’t exist? How would you go about reversing the string? For me, I’d loop through the string from back to forward build out a new string. You can event accomplish this a couple of different ways!
For loop with substring
$string = 'This is how you reverse with a for loop.';
$reverse = '';
$length = strlen($string) - 1;
for ($i = $length; $i >= 0; $i--) {
$reverse .= substr($string, $i, 1);
}
String to array
$string = 'This is how you reverse with a for loop.';
$string = str_split($string);
krsort($string);
$reverse = implode('', $string);
