Remove last character from String in PHP

There are three common ways to remove last character from String.

They are

•  substr and mb_substr
•  substr_replace 
•  rtrim

Remove last character from String in PHP using "substr and mb_substr"

$str = "Remove last character..";
echo substr($str, 0, -1);
echo mb_substr($str, 0, -1);

Remove last character from String in PHP using "substr_replace"

$str = "Remove last character..";
echo substr_replace($str ,"",-1);

Remove last character from String in PHP using "rtrim"

$str = "Remove last character..";
echo rtrim($str, ".");

Example

$str = "Remove last character..";

echo "substr: ".substr($str, 0, -1);
echo "<br/>";
echo "mb_substr: ".mb_substr($str, 0, -1);
echo "<br/>";
echo "substr_replace: ".substr_replace($str ,"",-1);
echo "<br/>";
 echo "rtrim: ".rtrim($str, ".");