Remove Last Character from String in PHP

This is a very common PHP question of HOW TO remove last character from string in PHP. Find below some ways how to delete last character from string in PHP.

    <?php 
    // method 1 - substr and mb_substr
    substr($string, 0, -1);
    mb_substr($string, 0, -1);
     
    // method 2 - substr_replace
    substr_replace($string, '', -1);
     
    // method 3 - rtrim
    // it trims all specified characters from end of the string
    rtrim($string, ".");
    ?>