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  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: namespace Nette\Utils;
  9: 
 10: use Nette;
 11: 
 12: 
 13: /**
 14:  * PHP callable tools.
 15:  */
 16: class Callback
 17: {
 18:     use Nette\StaticClass;
 19: 
 20:     /**
 21:      * @param  mixed   class, object, callable
 22:      * @param  string  method
 23:      * @return \Closure
 24:      */
 25:     public static function closure($callable, $m = null)
 26:     {
 27:         if ($m !== null) {
 28:             $callable = [$callable, $m];
 29: 
 30:         } elseif (is_string($callable) && count($tmp = explode('::', $callable)) === 2) {
 31:             $callable = $tmp;
 32: 
 33:         } elseif ($callable instanceof \Closure) {
 34:             return $callable;
 35: 
 36:         } elseif (is_object($callable)) {
 37:             $callable = [$callable, '__invoke'];
 38:         }
 39: 
 40:         if (is_string($callable) && function_exists($callable)) {
 41:             return (new \ReflectionFunction($callable))->getClosure();
 42: 
 43:         } elseif (is_array($callable) && method_exists($callable[0], $callable[1])) {
 44:             return (new \ReflectionMethod($callable[0], $callable[1]))->getClosure($callable[0]);
 45:         }
 46: 
 47:         self::check($callable);
 48:         $_callable_ = $callable;
 49:         return function (...$args) use ($_callable_) {
 50:             return $_callable_(...$args);
 51:         };
 52:     }
 53: 
 54: 
 55:     /**
 56:      * Invokes callback.
 57:      * @return mixed
 58:      * @deprecated
 59:      */
 60:     public static function invoke($callable, ...$args)
 61:     {
 62:         self::check($callable);
 63:         return call_user_func_array($callable, $args);
 64:     }
 65: 
 66: 
 67:     /**
 68:      * Invokes callback with an array of parameters.
 69:      * @return mixed
 70:      * @deprecated
 71:      */
 72:     public static function invokeArgs($callable, array $args = [])
 73:     {
 74:         self::check($callable);
 75:         return call_user_func_array($callable, $args);
 76:     }
 77: 
 78: 
 79:     /**
 80:      * Invokes internal PHP function with own error handler.
 81:      * @param  string
 82:      * @return mixed
 83:      */
 84:     public static function invokeSafe($function, array $args, $onError)
 85:     {
 86:         $prev = set_error_handler(function ($severity, $message, $file) use ($onError, &$prev, $function) {
 87:             if ($file === '' && defined('HHVM_VERSION')) { // https://github.com/facebook/hhvm/issues/4625
 88:                 $file = func_get_arg(5)[1]['file'];
 89:             }
 90:             if ($file === __FILE__) {
 91:                 $msg = preg_replace("#^$function\(.*?\): #", '', $message);
 92:                 if ($onError($msg, $severity) !== false) {
 93:                     return;
 94:                 }
 95:             }
 96:             return $prev ? $prev(...func_get_args()) : false;
 97:         });
 98: 
 99:         try {
100:             return call_user_func_array($function, $args);
101:         } finally {
102:             restore_error_handler();
103:         }
104:     }
105: 
106: 
107:     /**
108:      * @return callable
109:      */
110:     public static function check($callable, $syntax = false)
111:     {
112:         if (!is_callable($callable, $syntax)) {
113:             throw new Nette\InvalidArgumentException($syntax
114:                 ? 'Given value is not a callable type.'
115:                 : sprintf("Callback '%s' is not callable.", self::toString($callable))
116:             );
117:         }
118:         return $callable;
119:     }
120: 
121: 
122:     /**
123:      * @return string
124:      */
125:     public static function toString($callable)
126:     {
127:         if ($callable instanceof \Closure) {
128:             $inner = self::unwrap($callable);
129:             return '{closure' . ($inner instanceof \Closure ? '}' : ' ' . self::toString($inner) . '}');
130:         } elseif (is_string($callable) && $callable[0] === "\0") {
131:             return '{lambda}';
132:         } else {
133:             is_callable($callable, true, $textual);
134:             return $textual;
135:         }
136:     }
137: 
138: 
139:     /**
140:      * @return \ReflectionMethod|\ReflectionFunction
141:      */
142:     public static function toReflection($callable)
143:     {
144:         if ($callable instanceof \Closure) {
145:             $callable = self::unwrap($callable);
146:         }
147: 
148:         $class = class_exists(Nette\Reflection\Method::class) ? Nette\Reflection\Method::class : 'ReflectionMethod';
149:         if (is_string($callable) && strpos($callable, '::')) {
150:             return new $class($callable);
151:         } elseif (is_array($callable)) {
152:             return new $class($callable[0], $callable[1]);
153:         } elseif (is_object($callable) && !$callable instanceof \Closure) {
154:             return new $class($callable, '__invoke');
155:         } else {
156:             $class = class_exists(Nette\Reflection\GlobalFunction::class) ? Nette\Reflection\GlobalFunction::class : 'ReflectionFunction';
157:             return new $class($callable);
158:         }
159:     }
160: 
161: 
162:     /**
163:      * @return bool
164:      */
165:     public static function isStatic($callable)
166:     {
167:         return is_array($callable) ? is_string($callable[0]) : is_string($callable);
168:     }
169: 
170: 
171:     /**
172:      * Unwraps closure created by self::closure()
173:      * @internal
174:      * @return callable
175:      */
176:     public static function unwrap(\Closure $closure)
177:     {
178:         $r = new \ReflectionFunction($closure);
179:         if (substr($r->getName(), -1) === '}') {
180:             $vars = $r->getStaticVariables();
181:             return isset($vars['_callable_']) ? $vars['_callable_'] : $closure;
182: 
183:         } elseif ($obj = $r->getClosureThis()) {
184:             return [$obj, $r->getName()];
185: 
186:         } elseif ($class = $r->getClosureScopeClass()) {
187:             return [$class->getName(), $r->getName()];
188: 
189:         } else {
190:             return $r->getName();
191:         }
192:     }
193: }
194: 
Nette 2.4-20180703 API API documentation generated by ApiGen 2.8.0