PHP code example of phpfn / symbol

1. Go to this page and download the library: Download phpfn/symbol library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php.

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

phpfn / symbol example snippets




$a = symbol();

// OR

$b = \Fun\Symbol\Symbol::create();




$symbol = symbol('id');




var_dump(symbol() === symbol()); 
// expected output: false

var_dump(symbol('example') === symbol('example')); 
// expected output: false




define('EXAMPLE', symbol());

var_dump(is_symbol(EXAMPLE));
// expected output: true

class Example
{
    public const CLASS_CONST = EXAMPLE;
}

var_dump(is_symbol(Example::CLASS_CONST));
// expected output: true




serialize(symbol());
// Error




var_dump(is_string(symbol()));
// expected output: false

var_dump(is_int(symbol()));
// expected output: false

var_dump(is_float(symbol()));
// expected output: false

var_dump(is_bool(symbol()));
// expected output: false

var_dump(is_array(symbol()));
// expected output: false

var_dump(is_object(symbol()));
// expected output: false

var_dump(is_null(symbol()));
// expected output: false

var_dump(is_symbol(symbol()));
// expected output: true

var_dump(is_resource(symbol()));
// expected output: true




$a = symbol();
$b = $a;

var_dump($a === $b);
// expected output: true

var_dump(clone $a);
// Error



use Fun\Symbol\Symbol;

var_dump(Symbol::key(symbol('hello')));
// expected output: "hello"

var_dump(Symbol::key(symbol('hello')) === Symbol::key(symbol('hello')));
// expected output: true

var_dump(symbol('hello') === symbol('hello'));
// expected output: false




use Fun\Symbol\Symbol;

$reflection = Symbol::getReflection(Symbol::create('hello'));

$reflection->getName();      // Contains "hello" string
$reflection->getFileName();  // Provides path/to/file-with-symbol-definition.php
$reflection->getStartLine(); // Provides definition line

// etc...




use Fun\Symbol\Symbol;

var_dump(Symbol::for('a') === Symbol::for('a'));
// expected output: true

var_dump(Symbol::create('a') === Symbol::for('a'));
// expected output: false




var_dump(Symbol::keyFor(Symbol::for('a')));
// expected output: "a"

var_dump(Symbol::keyFor(Symbol::create('a')));
// expected output: null