PHP code that invokes a function through a string

Learn PHP to call functions through strings. 1. Call_user_func function A ($b, $c) { Echo $b; Echo $c; } Call_user_func (' A ', "111", "222"); Call_user_func (' A ', "333", "444"); Display 111 222 333 444 ?> Copy Code call the method inside the class is rather strange, incredibly using an array, do not know how developers think, of course, save new, is full of innovative: Class A { Function B ($c) { Echo $c; } }//Www.jbxue.com Call_user_func (Array ("A", "B"), "111"); Showing 111 ?> Copy Code 2. Call_user_func_array The Call_user_func_array function is similar to the Call_user_func, except that the parameter is passed in a different way, allowing the structure of the parameter to be clearer: function A ($b, $c) { Echo $b; Echo $c; } Call_user_func_array (' A ', Array ("111", "222")); Showing 111 of 222 ?> Copy Code The Call_user_func_array function can also invoke methods within the class. Class classa{ function BC ($b, $c) { $BC = $b + $c; Echo $BC; } }//Www.jbxue.com Call_user_func_array (Array (' ClassA ', ' BC '), Array ("111", "222")); Showing 333 ?> Copy Code Both the Call_user_func function and the Call_user_func_array function support references, which makes them more functionally consistent with normal function calls: Function A (& $b) { $b + +; } $c = 0; Call_user_func (' A ', & $c); echo $c;//Display 1 Call_user_func_array (' A ', Array (& $c)); echo $c;//Display 2 Copy Code

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