String in different ways

string in different ways

<?php

//STRING IN DIFFERENT WAYS
//----------------------------------------------

echo 'Iam David Heart';

echo 'embedded newlines
embedded newlines
embedded newlines';


echo 'David Heart: "I\'ll be back"';
// Outputs: David Heart: "I'll be back"

echo 'David Heart escape C:\\*.*?';
// Outputs: David Heart escape C:\\*.*?

echo 'David Heart can ou expand: \n a newline';
// Outputs: This will not expand: \n a newline

echo 'David Heart with the variables $david $heart';
// Outputs: David Heart with the variables $david $heart


//----------------------------------------------


$juices = array("apple", "orange", "koolaid1" => "purple");

echo "He drank some $juices[0] juice.".PHP_EOL;
echo "He drank some $juices[1] juice.".PHP_EOL;
echo "He drank some $juices[koolaid1] juice.".PHP_EOL;

class people {
    public $david = "david heart";
    public $jopper = "jopper bardillas";
    public $gian = "gian adrias";
    
    public $abunda = "abunda";
}

$people = new people();

echo "$people->david drank some $juices[0] juice.".PHP_EOL;
echo "$people->david then said hello to $people->jopper.".PHP_EOL;
echo "$people->gian's wife greeted $people->jopper.".PHP_EOL;
echo "$people->jopper greeted the two $people->abunda."; // Won't work


//-------------------------------------------------------------------------

$hello = 'my Hello World';

// Won't work, outputs: This is { my Hello World }
echo "This is { $hello}";

// Works, outputs: This is my Hello World
echo "This is {$hello}";
echo "This is ${hello}";

// Works
echo "This sample is {$square->width}00 centimeters broad."; 


// Works, quoted keys only work using the curly brace syntax
echo "This works: {$arr['key']}";


// Works
echo "This works: {$arr[4][3]}";

// This is wrong for the same reason as $foo[bar] is wrong  outside a string.
// In other words, it will still work, but only because PHP first looks for a
// constant named foo; an error of level E_NOTICE (undefined constant) will be
// thrown.
echo "This is wrong: {$arr[foo][3]}"; 

// Works. When using multi-dimensional arrays, always use braces around arrays
// when inside of strings
echo "This works: {$arr['foo'][3]}";

// Works.
echo "This works: " . $arr['foo'][3];

echo "This works too: {$obj->values[3]->name}";

echo "This is the value of the var named $name: {${$name}}";

echo "This is the value of the var named by the return value of getName(): {${getName()}}";

echo "This is the value of the var named by the return value of \$object->getName(): {${$object->getName()}}";

?>