May 30, 2020

The PHP character filter function removes the last comma of the string of rtrim

First of all,

trim filters both ends of the string, rtrim filter string tail,=chop() ltrim filters string headers.

Filter the keys in the string with str_replace. So for example,

PHP code

$str = '123,333,234,';
echo rtrim($str, ',');

rtrim instance code 2

<?php
$text = "\t\tThese are a few words :) ...  ";
$trimmed = rtrim($text);
// $trimmed = "\t\tThese are a few words :) ..."
$trimmed = rtrim($text, " \t.");
// $trimmed = "\t\tThese are a few words :)"
$clean = rtrim($binary, "\x00..\x1F");
// trim the ASCII control characters at the end of $binary
// (from 0 to 31 inclusive)
?>