(PHP 4, PHP 5, PHP 7, PHP 8)
strrev — Reverse a string
string
The string to be reversed.
Returns the reversed string.
Example #1 Reversing a string with strrev()
<?php
echo
strrev
(
"Hello world!"
);
// outputs "!dlrow olleH"
?>
<?php
/**
* Reverse a miltibyte string.
*
* @param string $string The string to be reversed.
* @param string|null $encoding The character encoding. If it is omitted, the internal character encoding value
* will be used.
* @return string The reversed string
*/functionmb_strrev(string $string, string $encoding= null): string{
$chars= mb_str_split($string, 1, $encoding?: mb_internal_encoding());
return implode('', array_reverse($chars));
}?>
It's faster and flexible than tianyiw function (comment #122953)This function support utf-8 encoding, Human Languague and Character Encoding Support:<?php
functionmb_strrev($str){$r= '';
for ($i= mb_strlen($str); $i>=0; $i--) {
$r.=mb_substr($str, $i, 1);
}
return$r;
}
echo mb_strrev("☆❤world"); // echo "dlrow❤☆"?>