PHP code example of serhatozdal / php-java-optional

1. Go to this page and download the library: Download serhatozdal/php-java-optional 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/ */

serhatozdal / php-java-optional example snippets


// ofEmpty refers Optional#empty() in java
// It is renamed as ofEmpty() because of empty() is reserved by PHP 
Optional::ofEmpty()->isPresent(); // false

Optional::of("value")->orElse("elseValue"); // value
 
Optional::ofEmpty()->orElseThrow(function () { throw .... }); // throws exception

Optional::ofEmpty()->filter(function ($a) { return (int) $a; }); // function is not executed

Optional::of(5)->map(function ($a) { return $a * 2; })->get(); // returns 10

Optional::ofEmpty()->orElseGet(function () { return 10; }); // returns 10