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run code in 150+ php & hhvm versions
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<?php class Request { public $answer = 42; public function __construct() { echo 'Request created', PHP_EOL; } } class DI { protected $shared = []; protected $definitions = []; public function __construct() {} public function set($name, $definition, $shared = false) { if($shared) { if(isset($shared[$name])) { throw new Exception("Definition '$name' is already set. Use DI::remove('$name') to remove it."); } $this->shared[$name] = $definition; } else { if(isset($definitions[$name])) { throw new Exception("Definition '$name' is already set. Use DI::remove('$name') to remove it."); } $this->definitions[$name] = $definition; } } public function getRaw($name) { if(!isset($this->definitions[$name])) { throw new Exception("Definition '$name' is not set. Use DI::set('$name', <definition>) to set it."); } return $this->definitions[$name]; } public function get($name) { $definition = $this->getRaw($name); if(is_callable($definition)) return $definition(); if(class_exists($definition)) return new $definition(); } public function getShared($name) { if(!isset($this->shared[$name])) { throw new Exception("Shared definition '$name' is not set. Use DI::set('$name', <definition>, true) to set it."); } $shared = $this->shared[$name]; if(is_callable($shared)) $this->shared[$name] = $shared(); else if(is_string($shared) && class_exists($shared)) $this->shared[$name] = new $shared(); return $this->shared[$name]; } } $di = new DI(); //Using an anonymous function $di->set('request1', function(){ return new Request(); }); //Using a class name non-shared $di->set('request2', 'Request', true); $request = $di->getShared('request2'); $request->answer = 5; var_dump($di->getShared('request2')); $request = $di->get('request1'); $request->answer = 5; var_dump($di->get('request1'));
based on ZW1P4
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
Request created object(Request)#3 (1) { ["answer"]=> int(5) } Request created Request created object(Request)#5 (1) { ["answer"]=> int(42) }
Output for 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/fnRTh on line 11
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/fnRTh on line 11
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/fnRTh on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/fnRTh on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/fnRTh on line 4
Process exited with code 255.