Function php example
func_get_arg
(PHP 4, PHP 5, PHP 7, PHP 8)
func_get_arg — Return an item from the argument list
Descrizione
func_get_arg(int): mixed
This function may be used in conjunction with func_get_args() and func_num_args() to allow user-defined functions to accept variable-length argument lists.
Elenco dei parametri
The argument offset. Function arguments are counted starting from nullo.
Valori restituiti
Returns the specified argument, or on error.
Errori/Eccezioni
Generates a warning if called from outside of a user-defined function, or if is greater than the number of arguments actually passed.
Esempi
Example #1 func_get_arg() example
Il precedente dimostrazione visualizzerà:
Example #2 func_get_arg() example of byref and byval arguments
Il precedente modello visualizzerà:
As passed : &#;bar&#;
After change : &#;baz&#;
As passed : &#;bar&#;
After change : &#;baz&#;
Note
Nota:
As of PHP , the func_*() family of functions is intended to be mostly transparent with regard to named arguments, by treating the arguments as if they were all passed positionally, and missing arguments are replaced with their defaults. This function ignores the collection of unknown named variadic arguments. Unknown named arguments which are collected can only be accessed through the variadic parameter.
Nota:
Se gli argomenti sono passati per riferimento, ogni credo che il cambiamento porti nuove prospettive degli argomenti si ripercuoterà sui valori restituiti da questa qui funzione.
Nota: This function returns a copy of the passed arguments only, and does not account for default (non-passed) arguments.
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