Write a PHP program to demostrate use of all String functions

Use of String Functions in PHP

MSBTE Question (4mark): 

Explain any four-string functions in PHP

What is the use of strlen() and strpos() functions

<?php
$s="String Function PHP";
echo "<br>String word count:";
print_r(str_word_count($s));
echo "<br>String len:";
print_r(strlen($s));
echo "<br>String reverse:";
print_r(strrev($s));
echo "<br>String postion:";
print_r(strpos($s,'PHP'));
echo "<br>String replcae:";
print_r(str_replace("Function","Functions",$s));
echo "<br>String upper word:";
print_r(ucwords($s));
echo "<br>Stringto upper:";
print_r(strtoupper($s));
echo "<br>String to lower:";
print_r(strtolower($s));
echo "<br>String repeat:";
print_r(str_repeat("Hi",5));
echo "<br>String compare:";
print_r(strcmp('Hello','Hello'));
echo "<br>sub String:";
print_r(substr($s,16));
echo "<br>String split:";
print_r(str_split($s));
echo "<br>String shuffle:";
print_r(str_shuffle($s));
echo "<br>String trim:";
print_r(trim($s));
echo "<br>String rtrim and ltrim:";
print_r(rtrim($s));
print_r(ltrim($s));
echo "<br>String chop:";
print_r(chop($s,'PHP'));
echo "<br>chunck split:";
print_r(chunk_split($s,1,'.'))
?>

Output: 

String word count:3
String len:19
String reverse:PHP noitcnuF gnirtS
String postion:16
String replcae:String Functions PHP
String upper word:String Function PHP
Stringto upper:STRING FUNCTION PHP
String to lower:string function php
String repeat:HiHiHiHiHi
String compare:0
sub String:PHP
String split:Array ( [0] => S [1] => t [2] => r [3] => i [4] => n [5] => g [6] => [7] => F [8] => u [9] => n [10] => c [11] => t [12] => i [13] => o [14] => n [15] => [16] => P [17] => H [18] => P )
String shuffle:rPHFiiuotgPntn ncS
String trim:String Function PHP
String rtrim and ltrim:String Function PHPString Function PHP
String chop:String Function
chunck split:S.t.r.i.n.g. .F.u.n.c.t.i.o.n. .P.H.P.