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function foobar($arg, $arg2) { echo __FUNCTION__, " got $arg and $arg2\n"; } foobar('one','two'); // OUTPUTS : foobar got one and two call_user_func_array("foobar", array("one", "two")); // // OUTPUTS : foobar got one and two As I can see both regular one and call_user_func_array method both outputs same, then why should one prefer it?
In which scenario regular calling method will fail but call_user_func_array will not?
Can I get any such example?
Thank you
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The call_user_func() is an inbuilt function in PHP which is used to call the callback given by the first parameter and passes the remaining parameters as argument. It is used to call the user-defined functions.
To apply a function to every item in an array, use array_map() . This will return a new array. $array = array(1,2,3,4,5); //each array item is iterated over and gets stored in the function parameter. $newArray = array_map(function($item) { return $item + 1; }, $array);
You have an array with the arguments for your function which is of indeterminate length.
$args = someFuncWhichReturnsTheArgs(); foobar( /* put these $args here, you do not know how many there are */ ); The alternative would be:
switch (count($args)) { case 1: foobar($args[0]); break; case 2: foobar($args[0], $args[1]); break; ... } Which is not a solution.
The use case for this may be rare, but when you come across it you need it.
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