Passing an Array as Arguments not an Array in PHP

Question

I seem to remember that in PHP there is a way to pass an array as a list of arguments for a function  dereferencing the array into the standard func  arg1   arg2  manner   But now I m lost on how to do it   I recall the manner of passing by reference  how to  glob  incoming parameters     but not how to de-list the array into a list of arguments   It may be as simple as func  amp  myArgs   but I m pretty sure that isn t it   But  sadly  the php net manual hasn t divulged anything so far   Not that I ve had to use this particular feature for the last year or so

User · Answer

For sake of completeness  as of PHP 5 1 this works  too    lt  php function title  title   name        return sprintf   s   s r n    title   name      function   new ReflectionFunction  title     myArray   array  Dr    Phil    echo  function- gt invokeArgs  myArray       prints  Dr  Phil    gt    See  http   php net reflectionfunction invokeargs  For methods you use ReflectionMethod  invokeArgs instead and pass the object as first parameter

User · Answer

http   www php net manual en function call-user-func-array php  call user func array  func   myArgs

User · Answer

As has been mentioned  as of PHP 5 6  you can  should   use the     token  aka  splat operator   part of the variadic functions functionality  to easily call a function with an array of arguments    lt  php function variadic  arg1   arg2           Do stuff     echo  arg1      arg2      array     Hello    World         Splat  the  array in the function call variadic     array        Hello World    Note  array items are mapped to arguments by their position in the array  not their keys   As per CarlosCarucce s comment  this form of argument unpacking is the fastest method by far in all cases  In some comparisons  it s over 5x faster than call user func array   Aside  Because I think this is really useful  though not directly related to the question   you can type-hint the splat operator parameter in your function definition to make sure all of the passed values match a specific type    Just remember that doing this it MUST be the last parameter you define and that it bundles all parameters passed to the function into the array    This is great for making sure an array contains items of a specific type    lt  php     Define the function     function variadic  var  SomeClass     items            items will be an array of objects of type  SomeClass        Then you can call     variadic  Hello   new SomeClass  new SomeClass       or even splat both ways   items         new SomeClass      new SomeClass      variadic  Hello       items

User · Answer

Also note that if you want to apply an instance method to an array  you need to pass the function as   call user func array array  instance   MethodName     myArgs

[php] Passing an Array as Arguments, not an Array, in PHP

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