string left trim and right trim php code example

Example 1: 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',

Example 2: php trim

<?php

$text   = "\t\tThese are a few words :) ...  ";
$binary = "\x09Example string\x0A";
$hello  = "Hello World";
var_dump($text, $binary, $hello);

print "\n";

$trimmed = trim($text);
var_dump($trimmed);

$trimmed = trim($text, " \t.");
var_dump($trimmed);

$trimmed = trim($hello, "Hdle");
var_dump($trimmed);

$trimmed = trim($hello, 'HdWr');
var_dump($trimmed);

// trim the ASCII control characters at the beginning and end of $binary
// (from 0 to 31 inclusive)
$clean = trim($binary, "\x00..\x1F");
var_dump($clean);

?>