PHP Classes

File: global/autoloader.php

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  Classes of Scott Arciszewski   Typed Arrays   global/autoloader.php   Download  
File: global/autoloader.php
Role: Class source
Content type: text/plain
Description: Class source
Class: Typed Arrays
Implement arrays of values of only one type
Author: By
Last change:
Date: 9 days ago
Size: 1,973 bytes
 

Contents

Class file image Download
<?php
declare(strict_types=1);

use
ParagonIE\TypedArrays\ObjectTypedArray;

// Load all the wrappers for scalar type
require_once __DIR__ . '/bool-array.php';
require_once
__DIR__ . '/float-array.php';
require_once
__DIR__ . '/int-array.php';
require_once
__DIR__ . '/string-array.php';
require_once
__DIR__ . '/double-array.php';
require_once
__DIR__ . '/functions.php';

spl_autoload_register(function (string $class_name) {
   
/* Security note: This will not allow escape characters, so the eval() below should be ok. */
   
if (!preg_match('#([A-Za-z0-9\\\\]+)(??+)$#', $class_name, $m)) {
       
// We are only interested in autoloading typed arrays
       
return false;
    }
    switch (
$m[1]) {
        case
'string':
        case
'int':
        case
'float':
        case
'bool':
           
// These wre autoloaded above!
           
return false;
        default:
            if (!
class_exists($m[1]) && !interface_exists($m[1])) {
                return
false;
            }
    }

   
// Okay, now let's generate the type container at runtime.
   
$depth = mb_str_split($m[2], 2, 'utf-8');
   
$composite = $m[1];
    for (
$i = 0; $i < count($depth); ++$i) {
        if (!
class_exists($composite . '??', false)) {
           
// Class definition
           
$exec = "class {$composite}?? extends " . ObjectTypedArray::class .
               
"\n{\n" .
               
" protected const string OBJECT_TYPE = '{$composite}';\n" .
               
"}\n\n";
           
// Function helper
           
$exec .= "function {$composite}??({$composite} ...\$args): {$composite}??\n" .
               
"{\n" .
               
" return new {$composite}??(...\$args);\n" .
               
"}\n\n";
           
/* We may want to consider dumping to a file instead of just executing. */
           
eval($exec);
        }
       
$composite .= '??';
    }
   
// For performance, you're going to want to use opcache
   
return true;
});