21636962765

Committed 03 Feb 2026 03:39PM UTC coverage: 93.312% (+0.05%) from 93.264%

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added CLAUDE.md

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95.65

/src/Utils/Callback.php

<?php

/**
 * This file is part of the Nette Framework (https://nette.org)
 * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
 */

declare(strict_types=1);

namespace Nette\Utils;

use Nette;
use function explode, func_get_args, ini_get, is_array, is_callable, is_object, is_string, preg_replace, restore_error_handler, set_error_handler, sprintf, str_contains, str_ends_with;


/**
 * PHP callable tools.
 */
final class Callback
{
        use Nette\StaticClass;

        /**
         * Invokes internal PHP function with own error handler.
         * @param  list<mixed>  $args
         * @param  callable(string, int): ?bool  $onError
         */
        public static function invokeSafe(string $function, array $args, callable $onError): mixed
        {
                $prev = set_error_handler(function ($severity, $message, $file) use ($onError, &$prev, $function): ?bool {
                        if ($file === __FILE__) {
                                $msg = ini_get('html_errors')
                                        ? Html::htmlToText($message)
                                        : $message;
                                $msg = preg_replace("#^$function\\(.*?\\): #", '', $msg);
                                if ($onError($msg, $severity) !== false) {
                                        return null;
                                }
                        }

                        return $prev ? $prev(...func_get_args()) : false;
                });

                try {
                        return $function(...$args);
                } finally {
                        restore_error_handler();
                }
        }


        /**
         * Checks that $callable is valid PHP callback. Otherwise throws exception. If the $syntax is set to true, only verifies
         * that $callable has a valid structure to be used as a callback, but does not verify if the class or method actually exists.
         * @return callable(): mixed
         * @throws Nette\InvalidArgumentException
         */
        public static function check(mixed $callable, bool $syntax = false): mixed
        {
                if (!is_callable($callable, $syntax)) {
                        throw new Nette\InvalidArgumentException(
                                $syntax
                                ? 'Given value is not a callable type.'
                                : sprintf("Callback '%s' is not callable.", self::toString($callable)),
                        );
                }

                return $callable;
        }


        /**
         * Converts PHP callback to textual form. Class or method may not exists.
         */
        public static function toString(mixed $callable): string
        {
                if ($callable instanceof \Closure) {
                        $inner = self::unwrap($callable);
                        return '{closure' . ($inner instanceof \Closure ? '}' : ' ' . self::toString($inner) . '}');
                } else {
                        is_callable(is_object($callable) ? [$callable, '__invoke'] : $callable, true, $textual);
                        return $textual;
                }
        }


        /**
         * Returns reflection for method or function used in PHP callback.
         * @param  callable(): mixed  $callable  type check is escalated to ReflectionException
         * @throws \ReflectionException  if callback is not valid
         */
        public static function toReflection($callable): \ReflectionMethod|\ReflectionFunction
        {
                if ($callable instanceof \Closure) {
                        $callable = self::unwrap($callable);
                }

                if (is_string($callable) && str_contains($callable, '::')) {
                        return new ReflectionMethod(...explode('::', $callable, 2));
                } elseif (is_array($callable)) {
                        return new ReflectionMethod($callable[0], $callable[1]);
                } elseif (is_object($callable) && !$callable instanceof \Closure) {
                        return new ReflectionMethod($callable, '__invoke');
                } else {
                        return new \ReflectionFunction($callable);
                }
        }


        /**
         * Checks whether PHP callback is function or static method.
         * @param  callable(): mixed  $callable
         */
        public static function isStatic(callable $callable): bool
        {
                return is_string(is_array($callable) ? $callable[0] : $callable);
        }


        /**
         * Unwraps closure created by Closure::fromCallable().
         * @param  \Closure(): mixed  $closure
         * @return \Closure|array{class-string|object, string}|string
         */
        public static function unwrap(\Closure $closure): \Closure|array|string
        {
                $r = new \ReflectionFunction($closure);
                $class = $r->getClosureScopeClass()?->name;
                if (str_ends_with($r->name, '}')) {
                        return $closure;

                } elseif (($obj = $r->getClosureThis()) && $obj::class === $class) {
                        return [$obj, $r->name];

                } elseif ($class) {
                        return [$class, $r->name];

                } else {
                        return $r->name;
                }
        }
}

1	<?php
2
3	/**
4	* This file is part of the Nette Framework (https://nette.org)
5	* Copyright (c) 2004 David Grudl (https://davidgrudl.com)
6	*/
7
8	declare(strict_types=1);
9
10	namespace Nette\Utils;
11
12	use Nette;
13	use function explode, func_get_args, ini_get, is_array, is_callable, is_object, is_string, preg_replace, restore_error_handler, set_error_handler, sprintf, str_contains, str_ends_with;
14
15
16	/**
17	* PHP callable tools.
18	*/
19	final class Callback
20	{
21	use Nette\StaticClass;
22
23	/**
24	* Invokes internal PHP function with own error handler.
25	* @param list<mixed> $args
26	* @param callable(string, int): ?bool $onError
27	*/
28	public static function invokeSafe(string $function, array $args, callable $onError): mixed	1✔
29	{
30	$prev = set_error_handler(function ($severity, $message, $file) use ($onError, &$prev, $function): ?bool {	1✔
31	if ($file === __FILE__) {	1✔
32	$msg = ini_get('html_errors')	1✔
33	? Html::htmlToText($message)
34	: $message;	1✔
35	$msg = preg_replace("#^$function\\(.*?\\): #", '', $msg);	1✔
36	if ($onError($msg, $severity) !== false) {	1✔
37	return null;	1✔
38	}
39	}
40
41	return $prev ? $prev(...func_get_args()) : false;	1✔
42	});	1✔
43
44	try {
45	return $function(...$args);	1✔
46	} finally {	×
47	restore_error_handler();	1✔
48	}
49	}
50
51
52	/**
53	* Checks that $callable is valid PHP callback. Otherwise throws exception. If the $syntax is set to true, only verifies
54	* that $callable has a valid structure to be used as a callback, but does not verify if the class or method actually exists.
55	* @return callable(): mixed
56	* @throws Nette\InvalidArgumentException
57	*/
58	public static function check(mixed $callable, bool $syntax = false): mixed	1✔
59	{
60	if (!is_callable($callable, $syntax)) {	1✔
61	throw new Nette\InvalidArgumentException(	1✔
62	$syntax	1✔
63	? 'Given value is not a callable type.'	1✔
64	: sprintf("Callback '%s' is not callable.", self::toString($callable)),	1✔
65	);
66	}
67
68	return $callable;	1✔
69	}
70
71
72	/**
73	* Converts PHP callback to textual form. Class or method may not exists.
74	*/
75	public static function toString(mixed $callable): string	1✔
76	{
77	if ($callable instanceof \Closure) {	1✔
78	$inner = self::unwrap($callable);	1✔
79	return '{closure' . ($inner instanceof \Closure ? '}' : ' ' . self::toString($inner) . '}');	1✔
80	} else {
81	is_callable(is_object($callable) ? [$callable, '__invoke'] : $callable, true, $textual);	1✔
82	return $textual;	1✔
83	}
84	}
85
86
87	/**
88	* Returns reflection for method or function used in PHP callback.
89	* @param callable(): mixed $callable type check is escalated to ReflectionException
90	* @throws \ReflectionException if callback is not valid
91	*/
92	public static function toReflection($callable): \ReflectionMethod\|\ReflectionFunction
93	{
94	if ($callable instanceof \Closure) {	1✔
95	$callable = self::unwrap($callable);	1✔
96	}
97
98	if (is_string($callable) && str_contains($callable, '::')) {	1✔
99	return new ReflectionMethod(...explode('::', $callable, 2));	1✔
100	} elseif (is_array($callable)) {	1✔
101	return new ReflectionMethod($callable[0], $callable[1]);	1✔
102	} elseif (is_object($callable) && !$callable instanceof \Closure) {	1✔
103	return new ReflectionMethod($callable, '__invoke');	1✔
104	} else {
105	return new \ReflectionFunction($callable);	1✔
106	}
107	}
108
109
110	/**
111	* Checks whether PHP callback is function or static method.
112	* @param callable(): mixed $callable
113	*/
114	public static function isStatic(callable $callable): bool
115	{
116	return is_string(is_array($callable) ? $callable[0] : $callable);	×
117	}
118
119
120	/**
121	* Unwraps closure created by Closure::fromCallable().
122	* @param \Closure(): mixed $closure
123	* @return \Closure\|array{class-string\|object, string}\|string
124	*/
125	public static function unwrap(\Closure $closure): \Closure\|array\|string	1✔
126	{
127	$r = new \ReflectionFunction($closure);	1✔
128	$class = $r->getClosureScopeClass()?->name;	1✔
129	if (str_ends_with($r->name, '}')) {	1✔
130	return $closure;	1✔
131
132	} elseif (($obj = $r->getClosureThis()) && $obj::class === $class) {	1✔
133	return [$obj, $r->name];	1✔
134
135	} elseif ($class) {	1✔
136	return [$class, $r->name];	1✔
137
138	} else {
139	return $r->name;	1✔
140	}
141	}
142	}

nette / utils / 21636962765

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