Is there any way to check if an array is in the following format:
array('foo'=>'bar','year'=>'2011');
And not:
array('php','code','computer');
array('foo'=>('foo'=>'bar'),'php'=>('something'=>'perl'))
-
And what is the format you are looking?codaddict– codaddict2010-12-05 17:53:40 +00:00Commented Dec 5, 2010 at 17:53
-
1I think you need to specify the format a little more clearly. For example, does the array have to contain exactly two string keys (keys that cannot be interpreted as numbers), each of which is to contain a string value?Mike– Mike2010-12-05 18:24:32 +00:00Commented Dec 5, 2010 at 18:24
Add a comment
|
3 Answers
function isArrayInFormat($array)
{
$key = array_keys($array);
$val = array_values($array);
$count = count($array);
for ( $i = 0; $i < $count; $i++ )
{
if (!is_string($key[$i]) || !is_string($val[$i]))
{
return false;
}
}
return true;
}
5 Comments
ajreal
the condition won't match is
$val[$i] is numeric
Reese Moore
Yes, that's sort of the point. The example says the format is mapping a string to a string.
Mike
If necessary, for a less strict test,
!is_string($val[$i]) could be changed to is_array($val[$i]).Reese Moore
@Mike: Well, that's the problem with questions like these where the 'format' is given as a small subset example of 'includes' and a small subset example of 'excludes'. It is possible to interpret what the format is in almost an infinite number of ways that will pass on all includes and fail on all excludes but which aren't what the asker had in mind.
Mike
Yes, I agree, the format is somewhat open-ended. I'd voted up your first comment, and was just suggesting something that might satisfy ajreal's comment.
First of all you have an error in second statement. I think you wanted to write
array('foo' => array('foo'=>'bar'),'php' => array('something'=>'perl'));
So conditions are: 1. is assosiative array 2. value is not an array
function isAssocAndFlat(array $array) {
// first we check if array is associatvie
$keys = array_keys($array);
// If the array keys of the keys match the keys, then the array must
// not be associative (e.g. the keys array looked like {0:0, 1:1...}).
if (array_keys($keys) !== $keys) {
foreach ($array as $key => $value) {
if (is_array($value)) {
return false;
}
}
return true;
}
return false;
}
This function passes all your examples.
@Reese Moore your function return invalid value when you test array like this:
$test = array('first' => 'value1', '2' => 'value2');
Comments
If the array is not too big and always has equal pattern structure in its elements, you could serialize it and check it with regex-pattern.
Advantage: the code execution is fairly quickly and it is relatively more clean and intelligent. Disadvantage: hard to write the regex-pattern when the array is multidimensional and even worse, when the values of the same element are of different types. You must watch for changes made in the format of the serialized string in the release of a new version of the language (PHP -> serialize).
You can test the following examples of various types of arrays for each of them ...
Example 1:
$arr_1 = array(1,22,333,); //-> a:3:{i:0;i:1;i:1;i:22;i:2;i:333;}
// $arr_1 = array(1,22,'333',); //-> a:3:{i:0;i:1;i:1;i:22;i:2;s:3:"333";}
if (is_array($arr_1) &&
preg_match('/^a:\d+:{(i:\d+;)+}$/', serialize($arr_1))
) {
echo 'TRUE';
} else {
echo 'FALSE';
}
If you want to combine the types in the above example you can use the following regular expression:
preg_match('/^a:\d+:{((i:\d+;)|(i:\d+;s:\d+:\"\w+\";))+}$/', serialize($arr_1))
Example 2:
$arr_2 = array('a', 'bb', 'ccccc',); //-> a:3:{i:0;s:1:"a";i:1;s:2:"bb";i:2;s:5:"ccccc";}
// $arr_2 = array('a', 'bb', 7,); //-> a:3:{i:0;s:1:"a";i:1;s:2:"bb";i:2;i:7;}
if (is_array($arr_2) &&
preg_match('/^a:\d+:{(i:\d+;s:\d+:\"\w+\";)+}$/', serialize($arr_2))
) {
echo 'TRUE';
} else {
echo 'FALSE';
}
Example 3:
$arr_3 = array(
array('name'=>'War and Peace', 'year'=>1865),
array('name'=>'Different Seasons', 'year'=>1982),
); // exit(serialize($arr_3));
// $arr_3 = array(
// array('name'=>'War and Peace', 'year'=>1865),
// array('name'=>'Different Seasons', 'year'=>'1982'),
// ); // exit(serialize($arr_3));
if (is_array($arr_3) &&
preg_match('/^a:\d+:{(i:\d+;a:\d+:{s:\d+:\"name\";s:\d+:\"[\w+\s+]+\";s:\d+:\"year\";i:\d{4};})+}$/', serialize($arr_3))
) {
echo 'TRUE';
} else {
echo 'FALSE';
}
... etc.
Comments
