PHP. Is it possible to use array_column with an array of objects
PHP 5
array_column
doesn't work with an array of objects. Use array_map
instead:
$titles = array_map(function($e) {
return is_object($e) ? $e->Title : $e['Title'];
}, $records);
PHP 7
array_column()
The function now supports an array of objects as well as two-dimensional arrays. Only public properties are considered, and objects that make use of
__get()
for dynamic properties must also implement__isset()
.
See https://github.com/php/php-src/blob/PHP-7.0.0/UPGRADING#L629 - Thanks to Bell for the hint!
Here is a function that will work on both php7 and php5
function array_column_portable($array, $key) {
return array_map(function($e) use ($key) {
return is_object($e) ? $e->$key : $e[$key];
}, $array);
}
You can then use it as you use array_column in php7
Is it possible to pass in array_column an array of objects?
PHP 7
Yes, see http://php.net/manual/en/function.array-column.php
PHP 5 >= 5.5.0
In PHP 5 array_column
does not work with an array of objects. You can try with:
// object 1
$a = new stdClass();
$a->my_string = 'ciao';
$a->my_number = 10;
// object 2
$b = new stdClass();
$b->my_string = 'ciao b';
$b->my_number = 100;
// array of objects
$arr_o = array($a,$b);
// using array_column with an array of objects
$result = array_column(array_map(function($o){return (array)$o;},$arr_o),'my_string');
PS: for clarity I prefer to not use array_column
and use array_map with an anonymous function
$result = array_map(function($o){ return $o->my_string; }, $arr_o);
or a simple foreach
$result = array();
foreach($arr_o as $o) {
$result[] = $o->my_string;
}