remove spaces from string php

1<?php
2$stripped = str_replace(' ', '', "10 1000 0000 000");
3echo $stripped;

1<?php
2$phone = preg_replace( '/\s+/', '', "01234 567890" );
3echo $phone;

1$string = preg_replace('/\s+/', '', $string);

1phpCopy<?php 
2$searchString = " ";
3$replaceString = "";
4$originalString = "This is a programming tutorial"; 
5 
6$outputString = preg_replace('/\s+/', '', $originalString); 
7echo("The original string is: $originalString \n");  
8echo("The string without spaces is: $outputString \n"); 
9?> 
10

1$string = "this is my     string"
2$string = preg_replace('/\s+/', '', $string);
3

1$str = "\n\n\nHello World!\n\n\n";
2echo "With trim: " . trim($str);