Week 3 - Day 5 - Playing with Strings

strings.php

<?php
/**
 * Programming in PHP
 * Week 3 - Day 5
 * Playing with Strings
 **/
 
/**
 * length of a string!
 **/

$string = 'Programming in PHP';

// Get the length of a string
echo strlen($string); // 18

/**
 * cases
 **/

$awkwardString = 'pRoGrAmMiNg In PhP';

// Lowercase that string
echo strtolower($awkwardString); // programming in php

// Uppercase that string
echo strtoupper($awkwardString); // PROGRAMMING IN PHP

/**
 * repeat a string!
 **/
 
$shortString = 'apple ';

// Repeat it!
echo str_repeat($shortString, 5); // apple apple apple apple apple 

/**
 * reverse and shuffle a string!
 **/
 
$palindrome = 'racecar';
$randomString = 'lemon lime soda';

// Reverse and check if it is a palindrome!
if( strrev($palindrome) == $palindrome ){
    echo 'This word is a palindrome!';
}

// Shuffle a string!
echo str_shuffle($randomString); // example: lolemn emsdaio 

/**
 * print a substring of a string
 **/
 
// using 'lemon lime soda'

$lime = substr($randomString, 6, 4); // string, position to start from, length of substring

echo $lime; // lime

/**
 * find and/or get position of a substring within a string
 **/
 
$position = strpos($randomString, 'lime'); // 6

if( $position !== FALSE ){
    echo 'lime found at position ' . $position;
}else {
    echo 'lime not found!';
}

/**
 * find and replace a substring
 **/
 
$replaced = str_replace('lemon', 'kiwi', $randomString); // search for this, replace with that, inside of this string

echo $replaced; // kiwi lime soda

/**
 * wrap a long string every x characters
 **/
 
$longString = 'This string can be really long if you wanted it to be!';

// split the string every 20 characters with a break
echo wordwrap($longString, 20, '<br/>');

/**
 * OUTPUT:
 *  This string can be
    really long if you
    wanted it to be!
 **/
 
// split a really long word

$longWord = 'Antidisestablishmentarianism';

echo wordwrap($longWord, 20, '<br/>'); // Antidisestablishmentarianism
// split the word!
echo wordwrap($longWord, 20, '<br/>', true);

/**
 * OUTPUT:
 *  Antidisestablishment
    arianism
 **/
 
?>