Function definitions alone are enough to correctly pass the argument by reference. The following things can be passed by reference: Variables, i.e. foo($a).

1) Pass by reference anything that should refer to and affect the original copy. 2) Pass not by reference things that will definitely not be altered in the ...

What References Are · Do · Passing

Passing a variable to a function is done by default as a value pass, ie, you are working with a copy. "But objects are passed by reference!" A common ...

Mar 4, 2007 · If you assign, pass, or return an undefined variable by reference, it will get created. Example #1 Using references with undefined variables. <?

References in PHP are a means to access the same variable content by different names. They are not like C pointers; for instance, you cannot perform pointer ...

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Returning References ¶. Returning by reference is useful when you want to use a function to find to which variable a reference should be bound.