PHP Call Function Example via string

  This article mainly introduces PHP through the string call function, need friends can refer to the following

1. Call_user_func     Code is as follows: function A ($b, $c) {  echo $b;   echo $c;} call_user_func (' A ', "111", "222" ); Call_user_func (' A ', "333", "444");  //Show 222 333 444?>     Calling class internal method is strange, incredibly with array, do not know how to consider the developer, of course, save the new, but also full of innovative:   Code as follows: Class A {  function B ($c) {    echo $c;  }} call_user_func (Array ("A", "B"), "111");  /Show?>     2. The Call_user_func_array   Call_user_func_array functions are very similar to Call_user_func, except that they are passed in a way that gives the parameters a clearer structure:     code as follows: function A ($b, $c) {  echo $b   echo $c;} call_user_func_array (' A ', Array ("111", "222"));  //Show the 222?>     Call_user_func_array function can also invoke the   code of the method inside the class as follows: Class classa{  function BC ($ B, $c) {      $BC = $b + $c;     echo $bc;  } call_user_func_array (Array (' ClassA ', ' BC ') Array ("111", "222"));  //Show 333?>     CALL_USER_FUNC functions and Call_user_func_array functions support references, which makes them and ordinary function calls more reactiveCan be consistent:     code as follows: Function A (& $b) {  $b + +;} $c = 0; Call_user_func (' A ', & $c); echo $c//Display 1 Call_user_func_array (' A ', Array (& $c)); echo $c//Show 2