How to remove spaces at the beginning and end of a string in php

/*
trim removes spaces from both ends of a string,
rtrim removes spaces from the right of a string,
ltrim removes spaces from the left of a string.
*/

echo trim("space")."";
echo rtrim("space")."";
echo ltrim("space")." ";
?>

Method 2: Replace with regular expression, more powerful. PHP removes spaces from the beginning and end of a string (including full-width)

$str="　　　Script Academy bbs.it-home.org 　　";
$str = mb_ereg_replace('^(　| )+', '', $str);
$str = mb_ereg_replace('(|