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Re: Sending nothing when function expects variable [message #178967 is a reply to message #178962]

Tue, 28 August 2012 13:01

Scott Johnson
Messages: 196
Registered: January 2012

Karma:

Senior Member

On 8/28/2012 12:08 AM, Goran wrote:
> On 28.8.2012 8:51, Jason C wrote:
>> or is there a way to set PHP to ignore this warning by default?
>
> Declare function this way:
>
> function whatever($a, $b = '', $c = '')
> {
> // your existing code
> }
>

This is a common problem, at least for me when first creating custom
class libraries for repeated use.

I find a way to make a function more useable over several needs and I
add extra parameters.

The default argument method works OK but you also need to make sure that
the defaults are received in order.

For example.

if you write
function func($a, $b='', $c='')

You cannot call $c without $b.

func('a','c')
will put 'c' in $b.

A few options that I have used is to pass an array of needed variables.

function func($arg_ary) {
//parse out $arg_ary
}
Call
$args = array('a'=>'a data','c'=>'c data')
func($args)

Or use the php built function

function func() {
// put incoming args in an array
$args_ary = func_get_args();

// Parse $args_ary
}

call
func('a','b');

These are obvious bare bone non-working examples with no error checking.

Also
http://www.php.net/manual/en/index.php is your best friend.

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[Message index]

		Sending nothing when function expects variable By: jwcarlton on Tue, 28 August 2012 06:51
		Re: Sending nothing when function expects variable By: Goran on Tue, 28 August 2012 07:08
		Re: Sending nothing when function expects variable By: Scott Johnson on Tue, 28 August 2012 13:01
		Re: Sending nothing when function expects variable By: Anders Wegge Keller on Tue, 28 August 2012 07:21
		Re: Sending nothing when function expects variable By: alvaro.NOSPAMTHANX on Tue, 28 August 2012 07:55
		Re: Sending nothing when function expects variable By: Tim Streater on Tue, 28 August 2012 08:23

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