Online PHP editor | rfc for urQ4k

@ 2018-10-11T20:16:46Z

<?php

$args = '$user, $number';
$body = 'echo "#$number: Hello $user.\n";';

function _create_function_without_eval($args, $body) {
    $func_name = sprintf('temp_func_%s', md5($body));
    $code = sprintf("<?php if (!function_exists('%s')) {function %s(%s){%s}}", $func_name, $func_name, $args, $body);
    $func_file = tempnam('/tmp', $func_name);
    $handle = fopen($func_file, "w+");
    fwrite($handle, $code);
    fclose($handle);
    include $func_file;
    unlink($func_file);
    return function(...$user_args) use ($func_name) {
      return call_user_func_array($func_name, $user_args); 
    };
}

function _create_function_with_eval($args, $body) {
    $func_name = sprintf('temp_func_%s', md5($body));
    $code = sprintf("if (!function_exists('%s')) {function %s(%s){%s}}", $func_name, $func_name, $args, $body);
    eval($code);
    return function(...$user_args) use ($func_name) {
      return call_user_func_array($func_name, $user_args); 
    };
}

$fn_deprecated = create_function($args, $body);
$fn_with_eval = _create_function_with_eval($args, $body);
$fn_without_eval = _create_function_without_eval($args, $body);

echo $fn_deprecated('Old Bob', '1');
echo $fn_without_eval('Bob without eval', 2);
echo $fn_with_eval('Bob with eval', 3);

Output for git.master, git.master_jit, rfc.property-hooks: Fatal error: Uncaught Error: Call to undefined function create_function() in /in/urQ4k:29 Stack trace: #0 {main} thrown in /in/urQ4k on line 29
Process exited with code 255.

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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