I have a certain function that returns me array cluttered with multiple cities repeated. This way:
<?php
function getArrayCities() {
return array("são paulo","rio de janeiro","belo horizonte","recife","fortaleza",
"porto alegre","jurerê","belo horizonte");
}
echo var_dump(getArrayCities());
Is there a function that excludes the repeated city from the array and successively sorts this same array ? If not, what would be the feasible method for this case?
To remove repeated values:
array_unique( $array );
To order:
sort( array &$array );
Also, if you want to ignore case, and consider numbers by their total value and not by the digits, you have this:
natcasesort( array &$array );
Note that array_unique returns array without repeats, but sort and natcasesort (as well as almost any sort function of PHP) sort the array in place and returns a boolean.
That is, this does not work here:
$ordenado = sort( $unico );
simply because the array is not returned by the function. The change is made directly to $unico passed. (note that in documentation, when a parameter is prefixed by & , it means that it is passed by reference, which is a strong indication that it can be modified in the destination).
To do both, it might look something like this:
$cidades = array(
'são paulo',
'rio de janeiro',
'belo horizonte',
'recife',
'fortaleza',
'porto alegre',
'jurerê',
'belo horizonte'
);
$cidades = array_unique( $cidades );
natcasesort( $cidades );
// agora $cidades está em ordem e sem repetição
See working at IDEONE .
You will probably need something more complex, which will sort accented characters correctly according to the language used. For these scenarios, PHP has a specific collection of functions:
What we care about is the Collator . Here's an example use:
$cidades = array_unique( $cidades );
$coll = collator_create( 'pt_BR' );
collator_sort( $coll, $cidades);