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php

    1: --TEST--
    2: Returning a reference from a function via another function
    3: --INI--
    4: error_reporting = E_ALL & ~E_STRICT
    5: --FILE--
    6: <?php
    7: function returnConstantByValue() {
    8: 	return 100;
    9: }
   10: 
   11: function &returnConstantByRef() {
   12: 	return 100;
   13: }
   14: 
   15: function &returnVariableByRef() {
   16: 	return $GLOBALS['a'];
   17: }
   18: 
   19: function &returnFunctionCallByRef($functionToCall) {
   20: 	return $functionToCall();
   21: }
   22: 
   23: echo "\n---> 1. Via a return by ref function call, assign by reference the return value of a function that returns by value:\n";
   24: unset($a, $b);
   25: $a = 4;
   26: $b = &returnFunctionCallByRef('returnConstantByValue');
   27: $a++;
   28: var_dump($a, $b);
   29: 
   30: echo "\n---> 2. Via a return by ref function call, assign by reference the return value of a function that returns a constant by ref:\n";
   31: unset($a, $b);
   32: $a = 4;
   33: $b = &returnFunctionCallByRef('returnConstantByRef');
   34: $a++;
   35: var_dump($a, $b);
   36: 
   37: echo "\n---> 3. Via a return by ref function call, assign by reference the return value of a function that returns by ref:\n";
   38: unset($a, $b);
   39: $a = 4;
   40: $b = &returnFunctionCallByRef('returnVariableByRef');
   41: $a++;
   42: var_dump($a, $b);
   43: 
   44: ?>
   45: --EXPECTF--
   46: ---> 1. Via a return by ref function call, assign by reference the return value of a function that returns by value:
   47: 
   48: Notice: Only variable references should be returned by reference in %s on line 15
   49: int(5)
   50: int(100)
   51: 
   52: ---> 2. Via a return by ref function call, assign by reference the return value of a function that returns a constant by ref:
   53: 
   54: Notice: Only variable references should be returned by reference in %s on line 7
   55: int(5)
   56: int(100)
   57: 
   58: ---> 3. Via a return by ref function call, assign by reference the return value of a function that returns by ref:
   59: int(5)
   60: int(5)