How to tell php a variable is an array?

[sueyic@gmail.com]

Hello,

What is the syntax for telling php that a variable is an array, or an
array of arrays?

Let's say I have $arrTerms

/*
@param array of arrays $arrTerms
*/
function test($arrTerms) {
$anotherArray = array('1', '2');

$intersect = array_intersect ($anotherArray, $arrTerms[0]);

}

This doesn't work and php tells me I'm trying to access $arrTerms[0] as
a array though it is not.

But actually, since $arrTerms is supposed to be an array of arrays --
$arrTerms[0] is an array ... how can I tell php this?

Thanks,
sue yi

[Chung Leong]

Re: How to tell php a variable is an array?

sueyic@gmail.co m wrote:[color=blue]
> Hello,
>
> What is the syntax for telling php that a variable is an array, or an
> array of arrays?
>
> Let's say I have $arrTerms
>
> /*
> @param array of arrays $arrTerms
> */
> function test($arrTerms) {
> $anotherArray = array('1', '2');
>
> $intersect = array_intersect ($anotherArray, $arrTerms[0]);
>
> }
>
> This doesn't work and php tells me I'm trying to access $arrTerms[0] as
> a array though it is not.
>
> But actually, since $arrTerms is supposed to be an array of arrays --
> $arrTerms[0] is an array ... how can I tell php this?[/color]

To tell if a variable holds an array--use is_array(). To force a
variable into being an array, do (array) $var or settype($var,
'array').

[sueyic@gmail.com]

Re: How to tell php a variable is an array?

Hi,

This is exactly the sort of answer I wanted ... thank you!! =)

[Carl Vondrick]

Re: How to tell php a variable is an array?

Chung Leong wrote:[color=blue][color=green]
>> What is the syntax for telling php that a variable is an array, or an
>> array of arrays?[/color][/color]

You can also type hint it:

function test(array $arrTerms) {

This requires PHP 5.x, however.

--
Carl Vondrick
Web-Engineer

https://www.carlsoft.net

[Mladen Gogala]

Re: How to tell php a variable is an array?

On Thu, 13 Apr 2006 15:20:10 -0700, Chung Leong wrote:
[color=blue]
> To tell if a variable holds an array--use is_array(). To force a
> variable into being an array, do (array) $var or settype($var,
> 'array').[/color]

Of course, type casting prevents you from seeing mistakes. I prefer to
kill the script if the scalar is passed instead of array. For that, there
is an "exit" function: if (!is_array($var )) {
exit(" var should be an array at line:".__LINE__ );
}


--

http://www.mgogala.com