I want to do this:
list($a, $b, $c) = array('a', 'b', 'c');
my_function($a, $b, $c);
BUT with unknown number of values in the array
my_function(some_function($array));
Any ideas?
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I think Machavity is right, but you can also look at php.net/manual/en/function.extract.phpmopo922– mopo9222014-12-04 19:01:57 +00:00Commented Dec 4, 2014 at 19:01
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duplicated call_user_func_array is the correct answer and aso the question is better explained than mine!xavip– xavip2014-12-04 21:54:53 +00:00Commented Dec 4, 2014 at 21:54
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3 Answers
You can pass the array to your function instead, this way you get all variables. If your array has keys, you can use the PHP extract() function.
// Build data array. Include keys as these will become the variable name later.
$data = array('a' => 'a', 'b' => 'b', 'c' => 'c');
// Call your function with data
my_function($data);
// Your function to parse data...
function my_function($data = NULL)
{
// Verify you got data..
if(is_null($data)){ return FALSE; }
// Extract the array so that each value in the array gets assigned to a variable by it's key.
extract($data);
// Now you may echo values
echo $a.$b.$c;
}
Another, more common option would be to loop through the array. Using a foreach loop you can reference each value of the array one at a time. This can be done like so:
// Build data array. Include keys as these will become the variable name later.
$data = array('a','b','c');
// Call your function with data
my_function($data);
// Your function to parse data...
function my_function($data = NULL)
{
// Verify you got data..
if(is_null($data)){ return FALSE; }
// Loop through data to operate
foreach($data as $item)
{
// Now you may echo values
echo $item;
}
}
Comments
If you pass an array as a parameter to a function, you may use a foreach loop to iterate through an array of any length.
someFunction($returnedArray){
foreach($returnedArray as $value){
echo $value
}
}
The foreach will go element by element, assigning the current index's value to (in this case) $value.
Comments
Just don't use list() function.
Pass an array to function. my_function(array(a, b, c,...)). It will be better if you will use hash array. Also extract() is not a good idea.
2 Comments
Mikel Bitson
I downvoted this so I feel obligated to say why. Just saying that extract() is not a good idea gives users that search and find this thread no explanation behind why they should not use it. Instead, consider explaining the risks of extract() and/or not providing the same answer as others.
Sannek8552