remove space put _ in php url code example

Example 1: php replace space with 20

//Replace space with %20 for url to understand
$new = str_replace(' ', '%20', $your_string);

//Alternate for URL use, use this
urlencode ( string $str )

Example 2: trim function php

/* Removes whitespace from beginning and end of a string if
* the second parameter is omitted
* First parameter must be the string
* Second parameter is optional and can include an alternative character or set of characters.
*/

// Example 1
$string = " Hello world ";
$trimmedString = trim($string);
// Output = 'Hello world',

// Example 2
$string = "babcabcHello worldabbaca";
$trimmedString = trim($string, 'abc');
// Output = 'Hello world',