php how to delete the space before and after string code example

Example 1: remove spaces from string php

<?php
$phone = preg_replace( '/\s+/', '', "01234 567890" );
echo $phone;

Example 2: php remove space before and after string

$words = '      my words     ';
$words = trim($words);
var_dump($words);
// string(8) "my words"