Introduction to the concrete implementation method of variable parameter list of PHP function

The PHP function variable argument list can be implemented by the three functions of _get_args (), Func_num_args (), Func_get_arg (). We have described this in more detail below.

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Perhaps for the PHP junior programmer, the PHP function is not fully proficient in mastering. Today we introduce to you the PHP function variable parameter list is mainly implemented using the Func_get_args (), Func_num_args (), Func_get_arg () Three system functions, wherein the Func_get_args () The function obtains a list of parameters in the form of an array, as specified in the manual.

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The PHP function variable argument list code is as follows:

2. < php
4. /**
6. * Implementation of multi-parameter list of functions
8. *
10. */
12. function Multiargs ()
14. {
16. /** returns the list of parameters as an array */
18. $args = Func_get_args();
20. Number of/** parameters */
22. $args_num = Func_num_args();
24. foreach ($args as $key => $value)
26. {
28. Echo ' This is ', $key +1, ' th argument: ', $value, '<br/>';
30. }
32. Echo ' number of args is ', $args _num;
34. }
36. Multiargs (' One ', ' one ', ' one ', ' three ');
38. /** Output */
40. /**
42. This is 1th Argument:one
44. This is 2th Argument:two
46. This is 3th argument:three
48. Number of args is 3
50. */
52. ?>

The above is the implementation method of the variable parameter list of PHP function.

Introduction to the concrete implementation method of variable parameter list of PHP function