Programming Tutorials

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func_get_arg() and func_get_args() functions in PHP

By: Marlin in PHP Tutorials on 2011年10月28日 [フレーム]

You may pass any number of extra parameters to a function, regardless of the prototyping. In addition, the arguments passed to a function will be available via the variable names defined in the function prototype, as well as via the func_get_arg() and func_get_args() functions.

For example:

function printme ($arg) {
 for ($ndx = 0; $ndx < $num_args; ++$ndx)
 $output .= func_get_arg ($ndx);
 print $output;
}
printme ("one ", "two"); # This prints "one two"

This behavior is useful for setting default values for function arguments and for ensuring that a certain number of arguments get passed to a function.




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