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<?php class Carro { protected $productos = array (); public function add ( $producto, $cantidad ) { $this->productos[$producto] = $cantidad; } public function what_inside_cart () { $cadena = ""; $callback = function ( $cantidad, $producto ) use ( &$cadena ) { $cadena += $producto . "\r\n"; }; array_walk ( $this->productos, $callback ); return $cadena; } } $mi_carro = new Carro; // Añadir algunos artículos al carro $mi_carro->add ( 'mantequilla', 1 ); $mi_carro->add ( 'leche', 3 ); $mi_carro->add ( 'huevos', 6 ); //echo $mi_carro->productos[0]; // al ser protected, dará error echo $mi_carro->what_inside_cart ();
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught TypeError: Unsupported operand types: string + string in /in/GYdtC:18 Stack trace: #0 [internal function]: Carro->{closure}(1, 'mantequilla') #1 /in/GYdtC(21): array_walk(Array, Object(Closure)) #2 /in/GYdtC(34): Carro->what_inside_cart() #3 {main} thrown in /in/GYdtC on line 18
Process exited with code 255.
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: A non-numeric value encountered in /in/GYdtC on line 18 Warning: A non-numeric value encountered in /in/GYdtC on line 18 Warning: A non-numeric value encountered in /in/GYdtC on line 18 Warning: A non-numeric value encountered in /in/GYdtC on line 18 0
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33
0
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/GYdtC on line 16
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/GYdtC on line 16
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/GYdtC on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/GYdtC on line 5
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/GYdtC on line 5
Process exited with code 255.

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